Add control-id label to Agent as required for N1C

[AlexFenlon]

Proposed changes

For NIC, this label is the same as installation-id but is required for use for N1C integration.

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 52.48%. Comparing base (07c302f) to head (0814d37).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/nginx/manager.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7849   +/-   ##
=======================================
  Coverage   52.47%   52.48%           
=======================================
  Files          90       90           
  Lines       21549    21550    +1     
=======================================
+ Hits        11308    11310    +2     
+ Misses       9772     9771    -1     
  Partials      469      469           

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