feat: automatic detection and configuration of OpenShift's external OIDC authentication

[tolusha]

What does this PR do?

Adds automatic detection and configuration of OpenShift's external OIDC authentication

Screenshot/screencast of this PR

N/A

What issues does this PR fix or reference?

eclipse-che/che#23831

How to test this PR?

follow the updated doc from eclipse-che/che-docs#3112

Common Test Scenarios

• Deploy Eclipse Che
• Start an empty workspace
• Open terminal and build/run an image
• Stop a workspace
• Check operator logs for reconciliation errors or infinite reconciliation loops

PR Checklist

As the author of this Pull Request I made sure that:

• The Eclipse Contributor Agreement is valid
• Code produced is complete
• Code builds without errors
• Tests are covering the bugfix
• The repository devfile is up to date and works
• Relevant user documentation updated
• Relevant contributing documentation updated
• CI/CD changes implemented, documented and communicated

Reviewers

Reviewers, please comment how you tested the PR when approving it.

[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

This pull-request has been approved by: tolusha

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[tolusha]

/retest

[tolusha]

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[rohanKanojia]

/che-ai-assistant ok-pr-review

[rohanKanojia]

I tested following the steps provided here and can confirm it's working as expected https://github.com/eclipse-che/che-docs/blob/updateinstallingcheonopenshift/modules/administration-guide/pages/proc_installing-che-on-openshift-with-keycloak-as-oidc.adoc

eclipse-che-oidc-authencation-auto-detection.mp4