Use python3 -m to fix tools not being found (#79432)
Uploading test stats have not been doing great due to this error
https://github.com/pytorch/pytorch/runs/6866279385?check_suite_focus=true
In the past, using python3 -m has fixed this
Pull Request resolved: https://github.com/pytorch/pytorch/pull/79432
Approved by: https://github.com/suo
