openshift auth provider POC [DO NOT MERGE]

[Zaperex]

Description

Just an initial POC of an openshift auth provider. Half of the requests still go through the backstage instance, so the TLS configurations won't exactly work. Logout is currently disabled since it seems the route handler does not pass in the accessToken to the logout function, and only passes in a refreshToken instead which this auth provider does not provide.

Please note that there's no entity provider to ingest the users that are expected by this auth provider, so manual ingestion may be necessary to test.

Which issue(s) does this PR fix

• Fixes RHIDP-3235

PR acceptance criteria

Please make sure that the following steps are complete:

• GitHub Actions are completed and successful
• Unit Tests are updated and passing
• E2E Tests are updated and passing
• Documentation is updated if necessary (requirement for new features)
• Add a screenshot if the change is UX/UI related

How to test changes / Special notes to the reviewer

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[sonarcloud]

Quality Gate passed

Issues
5 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[openshift-merge-robot]

PR needs rebase.

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[schultzp2020]

Stale, please reopen if needed.