Chore: Updates codecov configuration for the flag settings and notification delay

[stumpylog]

Proposed change

If I've set this up right, Codecov will now wait for 1 each upload for the frontend and backend flags before making a comment. That could be from either the commit CI or the pull request CI.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other (please explain) CI

Checklist:

• I have read & agree with the contributing guidelines.
• If applicable, I have tested my code for new features & regressions on both mobile & desktop devices, using the latest version of major browsers.
• If applicable, I have checked that all tests pass, see documentation.
• I have run all pre-commit hooks, see documentation.
• I have made corresponding changes to the documentation as needed.
• I have checked my modifications for any breaking changes.

[shamoon]

Cool, so it'll only comment on the relevant part (frontend vs backend) depending on the actual changes?

[stumpylog]

No, it's always going to include change, if any, for both flags. This should make it wait until both coverages have uploaded before commenting. And hopefully make it less likely to comment when there's no actual changes

[shamoon]

Ah gotcha, yea let’s go for it, nbd obviously

[github-actions]

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