[AMD-SMI] Export and document new fabric and process query APIs

[marifamd]

Motivation

The 7.14 fabric (IFoE/UALoE) and PID-grouped process APIs already shipped on
develop, but they were not reachable from the amdsmi package root and were
missing from the CLI guide, the Python API reference, and parts of the
changelog. This PR closes those gaps so the new APIs are usable via
from amdsmi import ... and fully documented for the release.

Technical Details

Python package (py-interface/__init__.py):

• Re-export amdsmi_get_gpu_process_list_by_pid, amdsmi_get_fabric_telemetry,
  and amdsmi_get_gpu_fabric_info; they were defined in amdsmi_interface but
  raised ImportError from the package root

CLI guide (docs/how-to/amdsmi-cli-tool.md):

• Add an amd-smi fabric subcommand section
• Show the --accelerator-partition alias in the amd-smi set help block

Python API reference (docs/reference/amdsmi-py-api.md):

• Add entries for amdsmi_get_gpu_process_list_by_pid,
  amdsmi_get_gpu_fabric_info, and amdsmi_get_fabric_telemetry

Changelog (CHANGELOG.md):

• Add the amdsmi_get_gpu_process_list_by_pid / --sort-by-pid addition and
  the amdsmi_nic_link_type_t removal
• List all five fabric C APIs and the two Python fabric APIs under the
  IFoE/UALoE entry
• Fix Sphinx hard breaks, collapse the wrapped static --clock headline, and
  tighten redundant wording

The literal amd-smi --help capture is intentionally left untouched: fabric
(like node/profile) is registered only when the amdgpu driver is
initialized, so it is documented as its own section rather than added to the
verbatim snapshot.

JIRA ID

N/A

Test Plan

• pre-commit run --config projects/amdsmi/.pre-commit-config.yaml --files projects/amdsmi/py-interface/__init__.py
• python3 -c "import ast; ast.parse(open('py-interface/__init__.py').read())"
• Reproduced the develop defect (ImportError: cannot import name 'amdsmi_get_fabric_telemetry') and confirmed the export change resolves it
• Verified balanced markdown code fences in both edited docs and zero remaining Sphinx hard-break violations in the 7.14 changelog section

Test Result

• pre-commit: all hooks passed (codespell, ruff-format, trailing-whitespace)
• __init__.py parses; the three names are now importable from amdsmi
• Docs fences balanced; changelog 7.14 section clean

Submission Checklist

• Look over the contributing guidelines at https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.