ci: try coveralls instead of codecov

[erisu]

Platforms affected

n/a

Motivation and Context

Codecov v3 seems to fail and Codecov v4 appears to have issues with tokenless settings.

Testing out Coveralls over Codecov

Description

replace Codecov CI configs with Coveralls

Testing

n/a

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[erisu]

Closing as not needed. Decided to update codecov and handled in #270