[v2.9] GitHub Auth Provider: allow to search teams

[pmatseykanets]

Issue:

#44907

Problem

GitHub auth provider uses GH users search API that only returns users and orgs. Therefore it's impossible to search for teams.

Solution

Given the list of orgs the user has access to pull teams for each org and do a simple prefix search on their names and add them to the search results.

Testing

Engineering Testing

Manual Testing

Automated Testing

• Test types added/modified:
  • Unit
  • Integration (Go Framework)
  • Integration (v2prov Framework)
  • Validation (Go Framework)
  • Other - Explain: EXPLAIN
  • None
  • REMOVE NOT APPLICABLE BULLET POINTS ABOVE
• If "None" - Reason: EXPLAIN THE REASON
• If "None" - GH Issue/PR: LINK TO GH ISSUE/PR TO ADD TESTS

Summary: TODO

QA Testing Considerations

Regressions Considerations

TODO

Existing / newly added automated tests that provide evidence there are no regressions:

• TODO

[JonCrowther]

LGTM

[crobby]

I think the change is solid.
Even though there's currently no tests for this provider, can you maybe add something to at least test the new functionality?

[crobby]

I like the testing tweaks. Not overly invasive imho.