Call profiler step via optimizer post hook (#90101)
This PR adds the `_profile_using_dynolog` function to `torch/__init__.py`. The `_profile_using_dynolog` method allows registering the optimizer step post hook. This is required to collect iteration based traces using dynolog.
Other related changes for tests to pass:
1. Updated `optimizer.pyi`
1. Updated `overrides.py`
1. The test `test_kineto_profiler_multiple_steppers` in `test_profiler.py` has been broken down into two cases:
- `test_kineto_profiler_multiple_steppers_with_override_True` : this test uses the override argument
- `test_kineto_profiler_multiple_steppers_with_override_False` : this test uses the environment variable
Pull Request resolved: https://github.com/pytorch/pytorch/pull/90101
Approved by: https://github.com/albanD
