Setup Java for JBang purposes in the Flaky test workflow

[michalvavrik]

Summary

I run test here #2050 and it seems that I need to setup Java for the JBang https://github.com/quarkus-qe/quarkus-test-suite/actions/runs/11041992883/job/30673453268. I didn't experience this locally for obvious reasons.

Please select the relevant options.

• Bug fix (non-breaking change which fixes an issue)
• Dependency update
• Refactoring
• Backport
• New scenario (non-breaking change which adds functionality)
• This change requires a documentation update
• This change requires execution against OCP (use run tests phrase in comment)

Checklist:

• Methods and classes used in PR scenarios are meaningful
• Commits are well encapsulated and follow the best practices

[michalvavrik]

@rsvoboda native failures are also happening in the daily build

[michalvavrik]

Thanks, but let's not wait again till full CI finishes, this PR is not really tested by this CI. I'll wait for the formatting to pass (which is not testing it either) and merge it. The workflow that is changed in this PR only runs on the main repo, never on the fork. Thanks