[CPU] Add mrope kernel for Qwen3-vl

[blzheng]

Motivation

This pr adds mrope kernel for Qwen3-vl on CPU.

Test plan:
python test/srt/cpu/test_rope.py -k test_mrope

Modifications

Accuracy Tests

Benchmarking and Profiling

Checklist

• Format your code according to the Format code with pre-commit.
• Add unit tests according to the Run and add unit tests.
• Update documentation according to Write documentations.
• Provide accuracy and speed benchmark results according to Test the accuracy and Benchmark the speed.