Codecov bash uploader is deprecated

[bluetech]

The Codecov bash uploader that the CI is using is deprecated and will stop working on Feb 1, 2022, with brownouts before then.

https://about.codecov.io/blog/introducing-codecovs-new-uploader/

We should update to their new uploader.

The relevant file is https://github.com/pytest-dev/pytest/blob/5fc7b21391c959bb5a54174d9084ad55131b8fdb/scripts/upload-coverage.sh

Called in CI from here:

pytest/.github/workflows/main.yml

Lines 168 to 172 in 5fc7b21

	- name: Upload coverage
	if: matrix.use_coverage && github.repository == 'pytest-dev/pytest'
	env:
	CODECOV_NAME: ${{ matrix.name }}
	run: bash scripts/upload-coverage.sh -F GHA,${{ runner.os }}

Note: the scripts/upload-coverage.sh script itself can stay in bash; just the codecov file it downloads should be changed to the new one.

[RonnyPfannschmidt]

should we use https://github.com/marketplace/actions/codecov while we are at it?

[bluetech]

Correct me if I'm wrong, but I don't think it will make the upload-coverage.sh redundant, since still need to do the python -m coverage xml step. So maybe it's not worth it...

[cristianMeli]

Hi there! Today I signed up at Hackertoberfest, I think that I could take this issue as my first contribution. What do you think @bluetech @RonnyPfannschmidt ?

[bluetech]

@cristianMeli Please do!

[mPandaRed]

Is this upload-coverage.sh file only being used in the GitHub action? If so, it looks like there is a pre-built Action created for Codecov V2:
https://github.com/marketplace/actions/codecov

The upload-coverage.sh file could be completely replaced by just the Action