feat: make unit and display name configurable

[adarsh0728]

Resolves #2268
Resolves #2279

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.28%. Comparing base (0c86e82) to head (24a64a8).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2269      +/-   ##
==========================================
+ Coverage   67.08%   67.28%   +0.19%     
==========================================
  Files         349      351       +2     
  Lines       45055    45275     +220     
==========================================
+ Hits        30227    30463     +236     
+ Misses      13756    13743      -13     
+ Partials     1072     1069       -3     

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[adarsh0728]

1. Latency metrics can have "s" and "ms" as units in config. If unset, then default behaviour. (second image has unit set as "ms").
2. For other metrics, default behaviour is followed. (1st, 3rd, 4th images are following default behaviour).
3. If display name is configured, then we show that display name, otherwise fallback to map name for that metric (if exists), else metric name itself is displayed.

[vigith]

Can we align the on-hover display?

[adarsh0728]

Resolved comment. Below are the screenshots after the latest changes.