[dynamo] Optimize COMPARE_OP (#122039)
Improves `benchmarks/dynamo/microbenchmarks/dynamo_microbenchmarks.py`
from 5.6 to 5.1s.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/122039
Approved by: https://github.com/Skylion007, https://github.com/anijain2305
