[1.4.z] Fix PEM certificate generation & OCP mounting & config prop context

[michalvavrik]

Summary

Backport #1123 as it is required for FIPS backports inside QE TS.

Please check the relevant options

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Dependency update
• Backport
• Refactoring
• 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]

The OpenShift Tests in JVM fail over OpenShiftExtensionIT, more specifically Build step io.quarkus.kubernetes.deployment.KubernetesDeployer#deploy threw an exception: java.lang.RuntimeException: Although a Kubernetes deployment was requested, it however cannot take place because there was an error during communication with the API Server at 'https://reducted'. It is flaky. I already tried to rerun this CI and it just fails over something else as it is unstable.

It's not related to changes here.