Store only coverage info as artifacts (#53150)
Summary:
I noticed https://github.com/pytorch/pytorch/issues/53126 stored everything in the test folder as an artifact, which isn't exactly what we want. Here, I try to store just the relevant info, coverage files.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/53150
Reviewed By: albanD
Differential Revision: D26767185
Pulled By: janeyx99
fbshipit-source-id: 286d341ccdfa97d138a2048bb4ee01c7ae2579a1
