Remove early exit in credential-dependent controllers when credentials are missing (#2530)

[fanny-jiang]

What does this PR do?

Cherry-pick #2530

Motivation

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Additional Notes

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Minimum Agent Versions

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• Agent: vX.Y.Z
• Cluster Agent: vX.Y.Z

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Checklist

• PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• PR has a milestone or the qa/skip-qa label
• All commits are signed (see: signing commits)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 37.73%. Comparing base (78652b2) to head (1bf1ada).

Additional details and impacted files

@@            Coverage Diff             @@
##            v1.23    #2549      +/-   ##
==========================================
- Coverage   37.79%   37.73%   -0.06%     
==========================================
  Files         303      303              
  Lines       25969    25956      -13     
==========================================
- Hits         9815     9795      -20     
- Misses      15411    15418       +7     
  Partials      743      743              

Flag	Coverage Δ
unittests	37.73% <ø> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
cmd/main.go	0.00% <ø> (-6.63%)	⬇️

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