Conditionalize references to OAuth2

[rolfedh]

Conditionalize references to OAuth2 in shared files.
@sberyozkin please review and approve.

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[sberyozkin]

Hi Rolfe, please only remove a ref to OAuth2 in the identity providers section

[rolfedh]

Thank you for your review, @sberyozkin. I've updated the PR based on your suggestions.
Rolfe

[quarkus-bot]

Status for workflow Quarkus Documentation CI

This is the status report for running Quarkus Documentation CI on commit 37062d0.

✅ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.

[sberyozkin]

Thanks Rolfe