Incorrect codecov reports for pull requests

[petermakowski]

Codecov reports dropping code coverage in pull requests where that's not the case^1. This seems to be caused by codecov not using the right base commit to compare against (which means there's probably an issue with our configuration^2 or uploader^3). This needs further investigation.

https://docs.codecov.com/docs/commit-status

https://app.codecov.io/gh/canonical-web-and-design/ubuntu.com/commit/e9b5b4fda6e61d7a3e1221e6d9ae669d687e901a

• [ ] Make codecov checks required once we verify this has been fixed

[petermakowski]

This still appears to not be working correctly, e.g.: https://github.com/canonical-web-and-design/ubuntu.com/pull/11604

[immortalcodes]

Do we still have code coverage in our codes? @petermakowski