[main-lts] Fix Build fails if quarkus-oidc-client is not in the classpath

[github-actions]

Backport: #829

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Fix #824

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[ricardozanini]

@hbelmiro I think we must make the CI run on this branch as well.

[ricardozanini]

@hbelmiro is there a way to rebase this PR?

[github-actions]

🎊 PR Preview 0e38b42 has been successfully built and deployed. See the documentation preview: https://quarkus-openapi-generator-preview-pr-840.surge.sh