add open telemetry framework, and using it add 1 new metric

[nirvanagit]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.

Project coverage is 73.37%. Comparing base (6f1cd09) to head (e1787fb).

Files	Patch %	Lines
admiral/pkg/controller/common/config.go	33.33%	1 Missing and 1 partial ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #296      +/-   ##
==========================================
- Coverage   73.47%   73.37%   -0.10%     
==========================================
  Files          35       35              
  Lines        3638     3670      +32     
==========================================
+ Hits         2673     2693      +20     
- Misses        797      804       +7     
- Partials      168      173       +5     

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