chore(backport release-0.8): fix(promotion): patch Application w/ Unstructured

[akuitybot]

Automated backport to release-0.8, triggered by a label in #2428.

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[codecov]

Codecov Report

Attention: Patch coverage is 45.61404% with 31 lines in your changes missing coverage. Please review.

Project coverage is 46.72%. Comparing base (c6bcd85) to head (b2c62ec).
Report is 1 commits behind head on release-0.8.

Files	Patch %	Lines
internal/kubeclient/patch.go	0.00%	20 Missing ⚠️
internal/controller/promotion/argocd.go	70.27%	9 Missing and 2 partials ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##           release-0.8    #2443      +/-   ##
===============================================
- Coverage        46.76%   46.72%   -0.04%     
===============================================
  Files              246      246              
  Lines            17699    17745      +46     
===============================================
+ Hits              8277     8292      +15     
- Misses            8994     9023      +29     
- Partials           428      430       +2     

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