add RoPE kernel to roofline plots in the latency-demo notebook

[yuhaohaoyu]

Lineage and Dependency

• Sub-task from EPIC [Docs] Add latency estimation demo notebook #94
• Sister-task: for a static multiple-core rope kernel def create rope_fwd_ktir.mlir #166

what's the goal

Add synthetic latency experiments of RoPE multiple core kernel in to the roofline sections of the latency_demo notebook.

What's the benefit

RoPE is an important accuracy boosting kernel used in IBM's Granite, and nearly every since DeepSeek. Including it in ktir-cpu's latency demo notebook is a great addition to showcase the usefulness of ktir-cpu.

How to assess completion

1. Update codes under notebooks/, with codes to parameterization of the kernel to full fill the 4-core, 32-core-strong-scaling, and 32-core-weak-scaling setup for the roofline section of latency_demo notebook.
2. Notebook run output (capture into html) for visual verification.