Remove unnecessary type assertion

[j1m-ryan]

Proposed changes

Static check reported this unnessary type assertion, removed as its always a runtime.Object

internal/certmanager/test_files/reactors.go:49:14: type assertion to the same type: createAction.GetObject() already has type runtime.Object (S1040)

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 53.21%. Comparing base (eba387b) to head (8f7d88a).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/certmanager/test_files/reactors.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6479      +/-   ##
==========================================
- Coverage   53.24%   53.21%   -0.03%     
==========================================
  Files          85       85              
  Lines       16015    16016       +1     
==========================================
- Hits         8527     8523       -4     
- Misses       7082     7085       +3     
- Partials      406      408       +2     

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