Add workflow to validate UBI images pass RedHat Certification

[shaun-nx]

Proposed changes

This change adds a new workflow file, openshift-certification.yml which is responsible for validating that our UBI based images of NGF, NGINX OSS, and NGF Operator will pass the RedHad certification process.

This workflow uses RedHat Openshift Preflight tool to pre-certify images before they are published:
https://github.com/redhat-openshift-ecosystem/openshift-preflight

Closes #3909

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.80%. Comparing base (cb31ea4) to head (afc676e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4035      +/-   ##
==========================================
- Coverage   86.83%   86.80%   -0.04%     
==========================================
  Files         128      128              
  Lines       16607    16607              
  Branches       62       62              
==========================================
- Hits        14421    14415       -6     
- Misses       2004     2009       +5     
- Partials      182      183       +1     

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[ciarams87]

If this isn't pushing anything don't need the dry run condition

[ciarams87]

However, it also doesn't need to run on every build - maybe only on merges to main and releases

[shaun-nx]

Sounds good. Just while testing, I'm going to have it run on pull requests as well for this PR.

So it will look like this:

openshift-certification:
  name: OpenShift Certification
  needs: [build-oss, build-plus, build-operator]
  if: >
    ${{ github.event_name == 'pull_request'
    && github.event.pull_request.base.ref == 'main'
    || (github.event_name == 'push' && github.ref == 'refs/heads/main')
    || (inputs.is_production_release == true)
    }}
  uses: ./.github/workflows/openshift-certification.yml
  with:
    runner: ubuntu-24.04
  permissions:
    contents: read
    packages: read
  secrets: inherit

[ciarams87]

Shouldn't the images being tested reflect what was built in this run instead of hardcoding to edge?

[shaun-nx]

You are right, I added these more to test the pipeline in general. I'll make sure those get updated