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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