🌱 Rename rev to cer in ClusterExtensionRevision reconciler for consistency

[perdasilva]

Description

Standardize the parameter name from rev to cer across reconcile, establishWatch, listPreviousRevisions, and toBoxcutterRevision methods to match the naming convention used elsewhere in the controller. Also simplify the establishWatch signature to a single line.

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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[Copilot]

Pull request overview

This PR standardizes the parameter naming in the ClusterExtensionRevision reconciler by renaming rev to cer across multiple methods. This aligns with the naming convention already established in other methods of the same reconciler (e.g., delete, archive, and all status helper functions).

Changes:

• Renamed parameter from rev to cer in four reconciler methods for consistency
• Renamed boxcutterRev to revision in establishWatch method
• Simplified the establishWatch method signature to a single line

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[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.08%. Comparing base (ddf921f) to head (10c9239).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...controllers/clusterextensionrevision_controller.go	83.33%	4 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2522      +/-   ##
==========================================
+ Coverage   70.11%   72.08%   +1.96%     
==========================================
  Files         103      103              
  Lines        8686     8686              
==========================================
+ Hits         6090     6261     +171     
+ Misses       2145     1944     -201     
- Partials      451      481      +30     

Flag	Coverage Δ
e2e	45.36% <0.00%> (?)
experimental-e2e	53.67% <73.80%> (-0.30%)	⬇️
unit	57.12% <83.33%> (ø)

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[pedjak]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: pedjak

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