adding olm.bundle image/relatedImages pullspec format validation

[grokspawn]

Assisted-By: Claude

Description of the change:

Motivation for the change:

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Docs updated or added to /docs
• Commit messages sensible and descriptive

[openshift-ci]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.47%. Comparing base (a40ca89) to head (114eeb7).
⚠️ Report is 6 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1905      +/-   ##
==========================================
+ Coverage   57.44%   57.47%   +0.03%     
==========================================
  Files         139      139              
  Lines       13323    13334      +11     
==========================================
+ Hits         7653     7664      +11     
  Misses       4488     4488              
  Partials     1182     1182              

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