feat: counter metrics visualizer for pipeline

[adarsh0728]

Changes in the UI to support visualisation of counter metrics for a pipeline.

1. Metrics added in the config: forwarder_data_read_total [ read processing rates ]
2. Placement: Metrics tab adjacent to Logs. [going forward, placement can be adjusted based on context to enhance debugging experience]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.94%. Comparing base (f5a79bf) to head (bb80711).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2238      +/-   ##
==========================================
- Coverage   64.14%   63.94%   -0.21%     
==========================================
  Files         339      339              
  Lines       41035    41035              
==========================================
- Hits        26322    26239      -83     
- Misses      13639    13723      +84     
+ Partials     1074     1073       -1     

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