fix: GCP config connector healthchecks do not make use of existing observedGeneration #24458

[Hapshanko]

Closes #24458

1. Add if obj.status.observedGeneration == nil or obj.status.observedGeneration == obj.metadata.generation then to deal with the race condition where the resource is not yet updated yet, but Argo CD already set health based on a stale status.
2. Update tests and add generation test.
3. Add missing health.lua to SQLUser
   Note: These config connector resources have observedGeneration, but I still added a nil check to be on the safe side.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
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Additional details and impacted files

@@            Coverage Diff            @@
##             master   #24459   +/-   ##
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  Coverage          ?   60.27%           
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  Files             ?      350           
  Lines             ?    59995           
  Branches          ?        0           
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  Hits              ?    36159           
  Misses            ?    20934           
  Partials          ?     2902           

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