add rope fusion detection tests

[howardzhang-cv]

Stack from ghstack (oldest at bottom):

• -> add rope fusion detection tests #4183

Summary

• Added some rope fusion detection tests for the 3 rope fusion patterns we have now

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/ao/4183

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

✅ You can merge normally! (1 Unrelated Failure)

As of commit 70bfad7 with merge base 6f56403 ():

BROKEN TRUNK - The following job failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• Run Regression Tests / test-nightly (CUDA Nightly, linux.g5.12xlarge.nvidia.gpu, --pre torch --index-url https://downloa... / linux-job (gh) (trunk failure)
  test/dtypes/test_nf4.py::TestComm::test_comm

This comment was automatically generated by Dr. CI and updates every 15 minutes.