make codecov work better

[drammock]

source of this idea is a codecov employee:

codecov/codecov-action#1274 (comment)

[gabalafou]

I wasn't sure at first if passing the secret via env would be a potential security issue, but the GitHub Actions docs state:

To make a secret available to an action, you must set the secret as an input or environment variable in the workflow file.
-https://docs.github.com/en/actions/security-guides/using-secrets-in-github-actions#accessing-your-secrets

So that seems legit to me and all of the checks pass on this PR, so I'm approving it.

[drammock]

OK, well the verbose helped, at least: we have useful information in the log now!

info - 2024-03-14 14:58:12,067 -- Process Commit creating complete
debug - 2024-03-14 14:58:12,067 -- Commit creating result --- {"result": "RequestResult(error=RequestError(code='HTTP Error 429', params={}, description='{\"detail\":\"Tokenless has reached GitHub rate limit. Please upload using a token: https://docs.codecov.com/docs/adding-the-codecov-token. Expected available in 705 seconds.\"}'), warnings=[], status_code=429, text='{\"detail\":\"Tokenless has reached GitHub rate limit. Please upload using a token: https://docs.codecov.com/docs/adding-the-codecov-token. Expected available in 705 seconds.\"}')"}
error - 2024-03-14 14:58:12,068 -- Commit creating failed: {"detail":"Tokenless has reached GitHub rate limit. Please upload using a token: https://docs.codecov.com/docs/adding-the-codecov-token. Expected available in 705 seconds."}
Error: Codecov: Failed to properly create commit: The process '/home/runner/work/_actions/codecov/codecov-action/v4/dist/codecov' failed with exit code 1

The token is not getting through somehow.

[drammock]

thanks for the teamwork on this one @gabalafou