MESH-0000: remove metrics due to sample limit

[rtay1188]

Checklist

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• I've read and agree to the project's contribution guidelines.
• I'm requesting to pull a topic/feature/bugfix branch.
• I checked that my code additions will pass code linting checks and unit tests.
• I updated unit and integration tests (if applicable).
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Description

These are metrics used to test new monitoring capabilities for Admiral 2.0. They should be removed from the current Admiral as they are overloading the sample limit.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 63.19%. Comparing base (ed49448) to head (255a04a).

Files with missing lines	Patch %	Lines
admiral/pkg/clusters/serviceentry.go	0.00%	4 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #370      +/-   ##
==========================================
- Coverage   63.25%   63.19%   -0.06%     
==========================================
  Files          91       91              
  Lines       12158    12159       +1     
==========================================
- Hits         7690     7684       -6     
- Misses       4053     4059       +6     
- Partials      415      416       +1     

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