Codecov in GitHub Actions fails

[sebix]

All "full" unittest workflows fail currently in the codecov step with:

[2022-08-01T07:49:28.945Z] ['info'] => Project root located at: /home/runner/work/intelmq/intelmq
[2022-08-01T07:49:28.949Z] ['info'] -> No token specified or token is empty
[2022-08-01T07:49:29.144Z] ['info'] Running coverage xml...
[2022-08-01T07:49:35.848Z] ['info'] Searching for coverage files...
[2022-08-01T07:49:36.018Z] ['info'] Warning: Some files located via search were excluded from upload.
[2022-08-01T07:49:36.018Z] ['info'] If Codecov did not locate your files, please review https://docs.codecov.com/docs/supported-report-formats
[2022-08-01T07:49:36.019Z] ['info'] => Found 1 possible coverage files:
  coverage.xml
[2022-08-01T07:49:36.019Z] ['info'] Processing /home/runner/work/intelmq/intelmq/coverage.xml...
[2022-08-01T07:49:36.042Z] ['info'] Detected GitHub Actions as the CI provider.
[2022-08-01T07:49:36.045Z] ['info'] Pinging Codecov: https://codecov.io/upload/v4?package=github-action-2.1.0-uploader-0.2.4&token=*******&branch=develop&build=2773076784&build_url=https%3A%2F%2Fgithub.com%2Fcerttools%2Fintelmq%2Factions%2Fruns%2F2773076784&commit=f1ec7b77331d37a6b11d15a254617a289d436da5&job=Unit+tests&pr=&service=github-actions&slug=certtools%2Fintelmq&name=&tag=&flags=&parent=
[2022-08-01T07:49:36.419Z] ['error'] There was an error running the uploader: Error uploading to [https://codecov.io:](https://codecov.io/) Error: There was an error fetching the storage URL during POST: 404 - {'detail': ErrorDetail(string='Unable to locate build via Github Actions API. Please upload with the Codecov repository upload token to resolve issue.', code='not_found')}

[sebix]

That currently prevents merges, as the unittest check is required.