ci: rebase before running samples check

[Redent0r]

Merge Checklist

• Followed patch format from upstream recommendation: https://github.com/kata-containers/community/blob/main/CONTRIBUTING.md#patch-format
  • Included a single commit in a given PR - at least unless there are related commits and each makes sense as a change on its own.
• Aware about the PR to be merged using "create a merge commit" rather than "squash and merge" (or similar)
• The upstream/missing label (or upstream/not-needed) has been set on the PR.

Summary

This removes the need for PR author to rebase feature branch for updated samples in target branch, if any

Test Methodology

Look at Check policy samples check below

[sprt]

You should remove the recent sample fix from your feature branch to properly test this change.

[Redent0r]

Do not merge yet: For some reason it's failing to rebase despite not being an actual conflict