chore: decouple health/readiness server from manager

[programmer04]

What this PR does / why we need it:

Closes #7044

Special notes for your reviewer:

The only run everywhere called should be this one the internal package should be only used in this import. I'm happy to address it in a separate PR. I think that in such a case ID can be hard coded to e.g. KIC-classic.

Further telemetry adjustments should be addressed in #7048

[codecov]

Codecov Report

Attention: Patch coverage is 49.42529% with 44 lines in your changes missing coverage. Please review.

Please upload report for BASE (feat/kic-as-library@e55bf68). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
internal/manager/run.go	43.9%	22 Missing and 1 partial ⚠️
internal/cmd/rootcmd/run.go	0.0%	10 Missing ⚠️
internal/util/test/controller_manager.go	14.2%	4 Missing and 2 partials ⚠️
pkg/manager/manager.go	68.7%	4 Missing and 1 partial ⚠️

Additional details and impacted files

@@                  Coverage Diff                  @@
##             feat/kic-as-library   #7071   +/-   ##
=====================================================
  Coverage                       ?   76.6%           
=====================================================
  Files                          ?     219           
  Lines                          ?   25069           
  Branches                       ?       0           
=====================================================
  Hits                           ?   19221           
  Misses                         ?    4838           
  Partials                       ?    1010           

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