chore: Tidy up Grafana dashboard

[dee-kryvenko]

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There was a few issues with the dashboard, not sure how no one caught this before... queries are mismatched i.e. Application Controller is pulling up Server metrics etc. I also mover gRPC to a separate collapsible panel, most of the time they would not be enabled and when they are - it takes a while to query. If I just want server metrics along with no gRPC, I should not have to wait... I fixed Application Controller panels, they would show up namespace as a legend for some reason - not sure what was the intent with that.. it now uses pod names. Lastly, I moved legend to a tooltip so it does not clatter the screen, now that instead of namespaces we are looking at pod names which are longer.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.24%. Comparing base (8841b0d) to head (6640b9b).
Report is 17 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #21265      +/-   ##
==========================================
- Coverage   55.15%   53.24%   -1.92%     
==========================================
  Files         337      337              
  Lines       57056    57056              
==========================================
- Hits        31472    30379    -1093     
- Misses      22879    24028    +1149     
+ Partials     2705     2649      -56     

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