🐛 fix: separate unpacked bundles by name

[joelanford]

Description

Fixes a bug caused by not setting the BundleSource.Name during unpack. Without the fix, it means that:

1. All cluster extension unpacking is happening in the same directory
2. Because of (1), only the most recently reconciled bundle will have its FS extracted at once.
3. Because of (2), when a ClusterExtension reconciles it has to re-pull and re-unpack its image if another ClusterExtension has reconciled in the meantime.
4. (Not a problem today) If we turned on concurrent reconciles, then things would likely break even harder because the unpacker would be racing to delete the what it thinks are unused unpack paths while other reconciles are writing to them for other ClusterExtensions.

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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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.54%. Comparing base (b29544b) to head (88ff438).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1243      +/-   ##
==========================================
+ Coverage   76.53%   76.54%   +0.01%     
==========================================
  Files          40       40              
  Lines        2340     2341       +1     
==========================================
+ Hits         1791     1792       +1     
  Misses        392      392              
  Partials      157      157              

Flag	Coverage Δ
e2e	57.66% <100.00%> (+0.01%)	⬆️
unit	52.49% <100.00%> (+0.02%)	⬆️

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