Inline coverage report combining/reporting (#49615)
Summary:
Instead of calling coverage frontend import coverage module and call combine() and html_report()
Fixes https://github.com/pytorch/pytorch/issues/49596 by not using a strict mode when combining those reports
Pull Request resolved: https://github.com/pytorch/pytorch/pull/49615
Reviewed By: seemethere
Differential Revision: D25645196
Pulled By: malfet
fbshipit-source-id: be55b5c23a3569a331cbdf3f86d8c89bc27d5fe1
