Improve Codecov settings to take advantage of "after_n_builds" and (if possible) flags

[obi1kenobi]

Courtesy of @jerrode:

1 thing I'd definitely recommend to deal with your notifications issue: after_n_builds in the .yml so Codecov knows to wait to notify until everything is uploaded

https://docs.codecov.io/docs/codecovyml-reference#codecovnotifyafter_n_builds

As far as running separate unit and integration tests, have you checked out our flags feature where you can tag separate builds? For example, tagging unit and integration tests separately?

https://docs.codecov.io/docs/flags

Lastly, if you are only uploading partial runs of your CI suite, you should check out Carryforward Flags so we can intelligently pick up only the new files uploaded: https://blog.codecov.io/2020/04/21/new-test-only-what-you-change-with-carryforward-flags/

Originally posted by @jerrode in #806 (comment)

[jerrode]

Good luck! Let me know if I can help.

[obi1kenobi]

Good luck! Let me know if I can help.

Much appreciated, thank you!