add bundle relatedimage image pullspec validation

[grokspawn]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 38.04%. Comparing base (884ff95) to head (0aefd13).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/validation/internal/bundle.go	87.50%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@ Coverage Diff @@## master #475 +/- ##
==========================================
+ Coverage 37.86% 38.04% +0.17% 
==========================================
Files 57 57 Lines 4563 4579 +16 ==========================================
+ Hits 1728 1742 +14 - Misses 2678 2679 +1 - Partials 157 158 +1 

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[Copilot]

Pull request overview

This PR adds validation for related image pullspecs in operator bundles to ensure they conform to valid container image reference formats. The validation leverages the github.com/distribution/reference library to parse and validate image references according to Docker distribution standards.

Changes:

• Added validateRelatedImages function to validate all relatedImages[].image fields in bundle CSVs
• Added comprehensive unit tests covering valid and invalid image formats
• Added github.com/distribution/reference dependency for image reference parsing

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated no comments.

File	Description
pkg/validation/internal/bundle.go	Implements validateRelatedImages function using distribution/reference library to validate image pullspecs; integrates validation into the main validateBundle function
pkg/validation/internal/bundle_test.go	Adds comprehensive test coverage for validateRelatedImages including empty images, valid formats (tags/digests), and various invalid formats (spaces, uppercase, special characters)
go.mod	Adds github.com/distribution/reference v0.6.0 as a new direct dependency and github.com/opencontainers/go-digest v1.0.0 as an indirect dependency
go.sum	Updates checksums for the new dependencies

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[acornett21]

I've approved this PR, since it works for my use case being called as a dependency as shown in the linked pr. I'll roll this out as soon as this is merged/released. Thanks for working on this.

[grokspawn]

Hey @acornett21 could I beg another LGTM? I shifted this to using the container-libs/image/v5/docker/reference, which is just the set of libs common to most of OLM and a wrapper to what we were calling before.

[rashmigottipati]

/lgtm

[grokspawn]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: acornett21, grokspawn, rashmigottipati

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• OWNERS [grokspawn]

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