feat(metrics): remove last from gauges and refactor hiding of metrics operations

[shellmayr]

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 95.23810% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 77.85%. Comparing base (f535fed) to head (1769627). Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #71322      +/-   ##
==========================================
- Coverage   77.85%   77.85%   -0.01%     
==========================================
  Files        6533     6533              
  Lines      291110   291127      +17     
  Branches    50377    50378       +1     
==========================================
+ Hits       226657   226665       +8     
- Misses      58218    58225       +7     
- Partials     6235     6237       +2     

Files	Coverage Δ
src/sentry/options/defaults.py	100.00% <100.00%> (ø)
...sentry/sentry_metrics/querying/metadata/metrics.py	84.74% <100.00%> (+2.05%)	:arrow_up:
...c/sentry/sentry_metrics/querying/metadata/utils.py	94.73% <90.00%> (-5.27%)	:arrow_down:

... and 6 files with indirect coverage changes