fix for dynamo xml reporting (#87378)
dynamo tests call a helper function in torch/_dynamo/test_case.py which then calls run_tests in common_utils.py so the test report path looked something like /opt/conda/lib/python3/10/site-packages/torch/_dynamo/test_case
* instead of using frame, use argv[0] which should be the invoking file
* got rid of sanitize functorch test name because theyve been moved into the test folder
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87378
Approved by: https://github.com/huydhn
