Need mechanism to turn on silently passing interop tests

[maddeleine]

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Problem:

We run our interop tests on every PR, but don't mark all of the interop combos as required. This is not great, but it's hard to keep track of which tests are actually working and would be good to add to the CI versus which are just flaky.

Solution:

Track how frequently interop tests pass that aren't required. If the test is succeeding for (lets say) a month, let us know(through a bot? an email?) that we can add it to our required tests.

Requirements / Acceptance Criteria:

s2n-quic maintainers are informed when more required tests can be added to CI.

• RFC links: N/A
• Related Issues: ci: Remove kwik from required interop tests #2489
• Will the Usage Guide or other documentation need to be updated? N/A
• Testing: N/A

Out of scope:

[boquan-fang]

This issue is also related to: https://github.com/aws/s2n-quic/blob/main/.github/interop/required.check.sh.