fix: ensure operator images are included in rendered bundles related images

[joelanford]

Signed-off-by: Joe Lanford joe.lanford@gmail.com

Description of the change:
When rendering bundles, make sure to parse the CSV's deployment specs to extract any images that aren't otherwise explicitly included in the CSV's related images field.

Motivation for the change:

When used to mirror a catalog to a disconnected environment, we should take care to try to find all of the related images that we can, even if they aren't explicitly included as related images by the operator author.

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

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[codecov]

Codecov Report

Merging #771 (ce9afbc) into master (0a190a8) will increase coverage by 0.03%.
The diff coverage is 87.50%.

❗ Current head ce9afbc differs from pull request most recent head babafb6. Consider uploading reports for the commit babafb6 to get more accurate results

@@            Coverage Diff             @@
##           master     #771      +/-   ##
==========================================
+ Coverage   50.41%   50.45%   +0.03%     
==========================================
  Files         102      102              
  Lines        8725     8719       -6     
==========================================
  Hits         4399     4399              
+ Misses       3473     3470       -3     
+ Partials      853      850       -3     

Impacted Files	Coverage Δ
pkg/sqlite/query.go	64.61% <86.66%> (-0.02%)	⬇️
alpha/action/render.go	64.02% <88.23%> (+2.39%)	⬆️

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[kevinrizza]

til about "k8s.io/apimachinery/pkg/util/sets"

[kevinrizza]

/lgtm