Validate regex before building image for e2e test

[Yaxhveer]

Added the Regex check before building image and made refactored changes accordingly.

Checklist

• [x] Changelog has been updated and is aligned with our changelog requirements
• [x] Commits are signed with Developer Certificate of Origin (DCO - learn more)

Fixes #4750

Relates to #

[Yaxhveer]

@JorTurFer PTAL.

[zroubalik]

/run-e2e nonsense Update: You can check the progress here

[JorTurFer]

/run-e2e nonsense Update: You can check the progress here

This won't help here, because the workflow is executed from main branch because it's a comment flow