test: try to fix Codecov configuration

[tskir]

There was this dependabot PR which I confirmed was working and merged: #301

The tests were passing in the PR, but after merging they failed in the main branch with the following error message:

[2023-12-04T20:52:25.943Z] ['error'] There was an error running the uploader: Error uploading to https://codecov.io: Error: There was an error fetching the storage URL during POST: 404 - {'detail': ErrorDetail(string='Could not find a repository associated with upload token ***', code='not_found')}

Our project indeed has a CODECOV_TOKEN secret, which is picked up by the workflow. It was updated 15 hours ago, and it looks like the tests have started failing since then.

Codecov documentation mentions (first question, last paragraph) that this token is not required for public repositories, so my idea is that by removing this entirely we might resolve the problem.

[tskir]

Ah, no, I think I've got it. Despite what the documentation says (unexpected right?), it looks like starting with Codecov v4 upload token is actually required even for public repositories. I've now updated it and restarted the test for the main branch, see if it works

[tskir]

Yes, that helped!

Closing this PR as no longer necessary.

[d0choa]

Indeed, I updated the token yesterday to see if that resolved the issues. The Codecov upload is a bit of a hit-and-miss at the moment. They have been recently acquired and it doesn't seem to be in a stable state. I've been monitoring whether people will be jumping out or using any alternative, but there is some inertia at the moment.