ref(metrics): Move CustomMetricsEventData to components

[ArthurKnaus]

Move to components/metrics folder, as it is used in multiple places.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.97%. Comparing base (372ba1e) to head (9fdcc77).

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #72188      +/-   ##
==========================================
- Coverage   77.97%   77.97%   -0.01%     
==========================================
  Files        6577     6577              
  Lines      293015   293015              
  Branches    50574    50574              
==========================================
- Hits       228482   228481       -1     
+ Misses      58300    58238      -62     
- Partials     6233     6296      +63     

Files	Coverage Δ
static/app/components/events/eventEntries.tsx	75.86% <ø> (ø)
...ts/interfaces/spans/newTraceDetailsSpanDetails.tsx	0.00% <ø> (ø)
.../components/events/interfaces/spans/spanDetail.tsx	56.29% <ø> (ø)
.../app/components/metrics/customMetricsEventData.tsx	77.35% <ø> (ø)
...newTraceDetails/traceDrawer/details/span/index.tsx	86.66% <ø> (ø)
...eDetails/traceDrawer/details/transaction/index.tsx	87.50% <ø> (ø)
.../performance/traceDetails/traceViewDetailPanel.tsx	0.00% <ø> (ø)

... and 108 files with indirect coverage changes