integrate codecov

[christianvogt]

https://issues.redhat.com/browse/RHOAIENG-5313

Description

Updates the PR workflow to run code coverage and upload results to codecov.

Configured not to fail CI if the upload fails and there are no thresholds set currently for project or patch so the coverage should only be informational at this time.

A comment will be left by Codecov bot after the coverage results are uploaded.

Codecov yml is configured to include status checks for project and patch level comparisons. These don't show up here so I do not know if it's not working or it simply requires the config to first be merged to main.

How Has This Been Tested?

Inspected codecov results here: https://app.codecov.io/github/opendatahub-io/odh-dashboard

Test Impact

N/A

Request review criteria:

Self checklist (all need to be checked):

• The developer has manually tested the changes and verified that the changes work
• Commits have been squashed into descriptive, self-contained units of work (e.g. 'WIP' and 'Implements feedback' style messages have been removed)
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has added tests or explained why testing cannot be added (unit or cypress tests for related changes)

If you have UI changes:

• Included any necessary screenshots or gifs if it was a UI change.
• Included tags to the UX team if it was a UI/UX change (find relevant UX in the SMEs section).

After the PR is posted & before it merges:

• The developer has tested their solution on a cluster by using the image produced by the PR to main

[codecov-commenter]

Welcome to Codecov 🎉

Once you merge this PR into your default branch, you're all set! Codecov will compare coverage reports and display results in all future pull requests.

Thanks for integrating Codecov - We've got you covered ☂️

[openshift-ci]

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