[GPU] doc update for broken links (openvinotoolkit#19829)

Author: isanghao

src/plugins/intel_gpu/docs/gpu_plugin_ops_enabling.md

@@ -3,9 +3,9 @@
 ## Terminology
 
 * **NGraph operation**: Building block of neural networks, such as convolution or pooling.
-* **(clDNN) Primitive**: Basic NN operation that was defined in clDNN. One primitive is usually mapped to one ngraph operation, but graph compilation may cause the mapping not to be 1-to-1.
+* **(GPU) Primitive**: Basic NN operation that was defined in GPU. One primitive is usually mapped to one ngraph operation, but graph compilation may cause the mapping not to be 1-to-1.
 * **Kernel**: Actual body of execution in GPU. It also refers to specific implementations of **Primitive** for GPU, such as `convolution_gpu_winograd_2x3_s1.cl`. Usually, single kernel fulfills the operation of a single primitive, but several kernels may be used to support one primitive.
-* **Unittest**: Single-layer test within clDNN.
+* **Unittest**: Single-layer test within GPU plugin.
 * **Functional test**: Single-layer test in IE.
 
 ## Adding new primitive
@@ -14,33 +14,33 @@
     * Review the [ngraph operation spec](https://github.com/openvinotoolkit/openvino/tree/master/docs/ops)
     * IE operations(a.k.a primitive or NN-layer) are defined by ngraph.
     * You can check ngraph reference implementation of the primitive as well
-        * For example, [Scatter Elements Update in nGraph](https://github.com/openvinotoolkit/openvino/blob/master/src/core/reference/include/ngraph/runtime/reference/scatter_elements_update.hpp)
+        * For example, [Scatter Elements Update in nGraph](https://github.com/openvinotoolkit/openvino/blob/master/src/core/reference/include/openvino/reference/scatter_elements_update.hpp)
 
 1. Try to find existing primitive that fully or partially covers this operation.
     * It is also possible to transform the network so that the missing primitive is covered from existing primitive.
     * For example, [replace reduce with pooling](https://github.com/openvinotoolkit/openvino/blob/23808f46f7b5d464fd649ad278f253eec12721b3/inference-engine/src/cldnn_engine/cldnn_engine.cpp#L205).
 
-1. Add new / extend existing clDNN primitive according to the operation spec.
-    1. This phase is to enable primitive within clDNN library, without exposing it to IE.
+1. Add new / extend existing GPU primitive according to the operation spec.
+    1. This phase is to enable primitive within GPU plugin, without exposing it to IE.
     1. Implement **reference parallel kernel** that supports all parameters of the operation and all input/output data types and layouts.
 
         | File | Description |
         |------|-------------|
         | [scatter_elements_update_ref.cl](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/src/kernel_selector/cl_kernels/scatter_elements_update_ref.cl) | OpenCL Kernel body. For more detail, please see [How to write OCL kernel](#writing-ocl-kernel) section |
         | [scatter_elements_update_kernel_ref.(cpp,h)](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/src/kernel_selector/kernels/scatter_update/scatter_elements_update_kernel_ref.cpp) | Counterpart of kernel body for host |
         | [scatter_elements_update_kernel_selector.(cpp,h)](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/src/kernel_selector/kernels/scatter_update/scatter_elements_update_kernel_selector.cpp) | Kernel selector for a primitive |
-        | [register_gpu.(cpp,hpp)](https://github.com/openvinotoolkit/openvino/blob/master/inference-engine/thirdparty/clDNN/src/gpu/register_gpu.cpp) | Primitive registration |
-        | [scatter_elements_update_gpu.cpp](https://github.com/openvinotoolkit/openvino/blob/master/inference-engine/thirdparty/clDNN/src/gpu/scatter_elements_update_gpu.cpp) | Primitive registration, input spec |
-        | [scatter_elements_update_inst.h](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/src/graph/include/scatter_elements_update_inst.h) | Node type declaration for clDNN program |
-        | [clDNN/src/scatter_elements_update.cpp](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/src/graph/scatter_elements_update.cpp) | Code for scatter_elements_update_inst.h |
-        | [clDNN/api/cldnn/primitives/scatter_elements_update.hpp](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/include/intel_gpu/primitives/scatter_elements_update.hpp) | clDNN primitive definition |
+        | [register.(cpp,hpp)](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/src/graph/impls/ocl/register.cpp) | Primitive registration |
+        | [scatter_elements_update.cpp](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/src/graph/impls/ocl/scatter_elements_update.cpp) | Primitive registration, input spec |
+        | [scatter_elements_update_inst.h](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/src/graph/include/scatter_elements_update_inst.h) | Node type declaration for GPU program |
+        | [src/graph/scatter_elements_update.cpp](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/src/graph/scatter_elements_update.cpp) | Code for scatter_elements_update_inst.h |
+        | [primitives/scatter_elements_update.hpp](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/include/intel_gpu/primitives/scatter_elements_update.hpp) | GPU primitive definition |
         | [common_types.h](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/src/kernel_selector/common_types.h) | Enum declaration for KernelType and arguments |
 
     1. Add unit tests for the new operation.
 
         | File | Description |
         |------|-------------|
-        | [scatter_elements_update_gpu_test.cpp](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/tests/test_cases/scatter_elements_update_gpu_test.cpp) | Unittest for layer |
+        | [scatter_elements_update_gpu_test.cpp](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/tests/unit/test_cases/scatter_elements_update_gpu_test.cpp) | Unittest for layer |
 
         * You need to add reference code or expected result for checking the result.
 
@@ -67,16 +67,15 @@
     1. Support layer fusion, if applicable
         * It is usually easy to fuse some layers, such as *scale*, *activation*, *quantize*, and *eltwise*, into the previous layer. This fusing rule can be added to `prepare_primitive_fusing::fuse_simple_primitives`.
         * `fuse_simple_primitives` is called during [graph compilation phase](https://github.com/openvinotoolkit/openvino/blob/71c50c224964bf8c24378d16f015d74e2c1e1ce8/inference-engine/thirdparty/clDNN/src/program.cpp#L430)
-        * See general description of layer fusion [here](https://docs.openvinotoolkit.org/latest/openvino_docs_IE_DG_supported_plugins_CL_DNN.html#optimizations)
-        * Unit tests for layer fusion are placed in a single file: [fusings_gpu_test.cpp](https://github.com/openvinotoolkit/openvino/blob/master/inference-engine/thirdparty/clDNN/tests/test_cases/fusings_gpu_test.cpp). It is also compiled into `ov_gpu_unit_tests`.
+        * Unit tests for layer fusion: [link](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/tests/unit/fusions/scatter_elements_update_fusion_test.cpp). It is also compiled into `ov_gpu_unit_tests`.
         * Code for fused layers are generated with `jitter`. It is created as `FUSED_OPS..` macro in OCL code. This generation logic is in `KernelBase::MakeFusedOpsJitConstants`.
 
 1. Add / update factory for this operation in the GPU plugin to use new primitive in inference-engine.
 
     | File | Description |
     |------|-------------|
-    | [cldnn_engine/ops/scatter_elements_update.cpp](https://github.com/openvinotoolkit/openvino/blob/master/inference-engine/src/cldnn_engine/ops/scatter_elements_update.cpp) | Instantiation from clDNN plugin for IE |
-    | [cldnn_primitives_list.hpp](https://github.com/openvinotoolkit/openvino/blob/master/inference-engine/src/cldnn_engine/cldnn_primitives_list.hpp) | Registration for primitives |
+    | [plugin/ops/scatter_elements_update.cpp](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/src/plugin/ops/scatter_elements_update.cpp) | Instantiation of gpu plugin primitive from IE |
+    | [primitives_list.hpp](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/include/intel_gpu/plugin/primitives_list.hpp) | Registration for primitives |
 
 1. Add functional single-layer tests for the operation and try to cover most of the different use cases of this operation.
 
@@ -126,7 +125,7 @@ Jitter generates macros for index calculations. With these macros, you can progr
 
 If a kernel is not performance-critical, you can support `bfyx`, `bfzyx` and `bfwzyx` only for layout. Those are default layouts. As an optimized format, `b_fs_yx_fsv16`, `b_fs_yx_fsv4` or `byxf` can be used as well.
 
-[General description of layout can be found here](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/docs/gpu_memory_formats.md) and [header file is here](https://github.com/openvinotoolkit/openvino/blob/master/inference-engine/thirdparty/clDNN/api/tensor.hpp).
+[General description of layout can be found here](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/docs/gpu_memory_formats.md) and [header file is here](https://github.com/openvinotoolkit/openvino/blob/master/src/plugins/intel_gpu/include/intel_gpu/runtime/format.hpp).
 
 ### Layer fusion