Add checkout to release workflows

[michalvavrik]

Summary

I leftout checkout here #1441 because release workflows doesn't need any specific branch, current main is just fine. Seems to be necessary anyway though https://github.com/quarkus-qe/quarkus-test-framework/actions/runs/12302119733/job/34334240205. I can't find proper docs that would say why actions run in /home/runner/work/quarkus-test-framework/quarkus-test-framework/.github/actions/release and FW is not there. Maybe it's in a parent dir, anyway, using checkout as that's what we do everywhere.

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