✨ Implement Boxcutter

[thetechnick]

Description

Reviewer Checklist

• API Go Documentation
• Tests: Unit Tests (and E2E Tests, if appropriate)
• Comprehensive Commit Messages
• Links to related GitHub Issue(s)

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[joelanford]

Is this an OLM-ism or a boxcutter-ism? I wonder if json.NewEncoder(hasher).Encode(objectToWrite) would be better?

[thetechnick]

This is a kubernetes apimachinery thing:
https://github.com/kubernetes/kubernetes/blob/627ce4946ccd6b67bc18f5a4dda92cf6c583e9b7/pkg/util/hash/hash.go#L26-L32
https://github.com/kubernetes/apimachinery/blob/master/pkg/util/dump/dump.go

I'll import from apimachinery next.

[codecov]

Codecov Report

❌ Patch coverage is 71.41553% with 313 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.03%. Comparing base (c7a6ba7) to head (c175077).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...controllers/clusterextensionrevision_controller.go	78.13%	56 Missing and 12 partials ⚠️
internal/operator-controller/applier/boxcutter.go	74.29%	42 Missing and 22 partials ⚠️
api/v1/zz_generated.deepcopy.go	48.62%	52 Missing and 4 partials ⚠️
cmd/operator-controller/main.go	72.83%	31 Missing and 16 partials ⚠️
...perator-controller/rukpak/util/testing/bundlefs.go	0.00%	42 Missing ⚠️
internal/operator-controller/applier/helm.go	57.14%	10 Missing and 5 partials ⚠️
...troller/controllers/clusterextension_controller.go	89.47%	9 Missing and 3 partials ⚠️
internal/operator-controller/applier/preflight.go	40.00%	8 Missing and 1 partial ⚠️

Additional details and impacted files

@@ Coverage Diff @@## main #1946 +/- ##
==========================================
- Coverage 72.79% 72.03% -0.76% 
==========================================
Files 79 85 +6 Lines 7421 8332 +911 ==========================================
+ Hits 5402 6002 +600 - Misses 1670 1927 +257 - Partials 349 403 +54 

Flag	Coverage Δ
e2e	39.42% <13.67%> (-4.78%)	⬇️
experimental-e2e	46.10% <58.40%> (-10.03%)	⬇️
unit	56.67% <44.10%> (-1.69%)	⬇️

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