PRs are not reporting coverage report

[kesara]

Describe the issue

PRs are not reporting on code coverage and the docker step that sends coverage to Codecov seems to fail.

Also, see #439 (comment)

Code of Conduct

• I agree to follow the IETF's Code of Conduct

[microamp]

Not urgent, but as food for thought:

• Is it possible that the existing token is tied to the main branch only?

• Is setting up a token necessary considering this is a public repo?

  For public repositories: Codecov uses GitHub/Bitbucket/GitLab API's to authorize users. No setup is necessary.

  https://docs.codecov.com/docs/frequently-asked-questions#how-do-i-add-new-users-to-my-repository