Adds a NoDeletes function to the Syncer

[rspurgeon]

Summary

If the Syncer is configured with noDeletes true, deleteDuplicates and delete operations are skipped entirely in the diff() function.

Testing WIP

Full changelog

• Adds NoDeletes function to Syncer. Usage of this feature in decK will come in a subsequent change.

Testing

Testing WIP, Draft PR for now.

• Unit tests
• E2E tests
• Manual testing on Universal
• Manual testing on Kubernetes

[CLAassistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Project coverage is 29.81%. Comparing base (01fa2d0) to head (3f8581f).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/diff/diff.go	0.00%	8 Missing ⚠️
pkg/file/writer.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #143      +/-   ##
==========================================
- Coverage   29.88%   29.81%   -0.07%     
==========================================
  Files         106      106              
  Lines       12631    12596      -35     
==========================================
- Hits         3775     3756      -19     
+ Misses       8393     8377      -16     
  Partials      463      463              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.