Support OpenShift certificate serving used with TLS registry

[michalvavrik]

Summary

Adding support for certificate serving so that we can test this section of the Quarkus TLS registry extension reference: https://quarkus.io/guides/tls-registry-reference#utilizing-openshift-serving-certificates

I have only implemented it for template-based builder. I think it should be technically possible to test this with extension-based builder, but probably need to configure Quarkus OpenShift extension specific properties inside of the test. It is not really relevant as I care about TLS registry reference verification ATM.

Regarding limitation to Quarkus runtime inside of this PR. I have added it so that I avoid (not necessarily) possible side-effects. I am just implementing what I need and if someone needs more, they need to extend functionality.

Please check the relevant options

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Dependency update
• Refactoring
• Release (follows conventions described in the RELEASE.md)
• Breaking change (fix or feature that would cause existing functionality to change)
• This change requires a documentation update
• This change requires execution against OCP (use run tests phrase in comment)

Checklist:

• Example scenarios has been updated / added
• Methods and classes used in PR scenarios are meaningful
• Commits are well encapsulated and follow the best practices

[michalvavrik]

run tests

[michalvavrik]

run tests

[gtroitsk]

Great work, thank you!