[profiler][refactor] Avoid using legacy event in profiler (#61721)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/61721
Remove dependency on LegacyEvent from the profiler
Test Plan:
python test/test_profiler.py -v
Imported from OSS
Reviewed By: kimishpatel, gdankel
Differential Revision: D29716769
fbshipit-source-id: 2c2b48f2ee096adcbde09821e0cc7c0fcb94d19f
