Preserve external controller annotations on Services (#4182)

[ciarams87]

Proposed changes

Cherry-pick of #4182

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

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

Preserve external controller annotations.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.12%. Comparing base (b3fdc43) to head (58a35e8).
⚠️ Report is 3 commits behind head on release-2.2.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-2.2    #4238      +/-   ##
===============================================
+ Coverage        86.11%   86.12%   +0.01%     
===============================================
  Files              131      131              
  Lines            14257    14282      +25     
  Branches            74       74              
===============================================
+ Hits             12277    12301      +24     
  Misses            1777     1777              
- Partials           203      204       +1     

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