Format all prometheus metrics to ensure nice indent

[ahrtr]

@mmorel-35 do you know is there a linter to enforce the nice indent for metrics definition?

cc @fuweid @ivanvc @jmhbnz @dims @serathius

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Test name	Commit	Details	Required	Rerun command
pull-etcd-release-tests	614640f	link	false	/test pull-etcd-release-tests

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.83%. Comparing base (35d20d1) to head (614640f).
Report is 2 commits behind head on main.

Additional details and impacted files

Files with missing lines	Coverage Δ
server/auth/metrics.go	87.50% <ø> (ø)
server/etcdserver/api/etcdhttp/health.go	91.46% <ø> (ø)
server/etcdserver/api/membership/metrics.go	100.00% <ø> (ø)
server/etcdserver/api/rafthttp/metrics.go	100.00% <ø> (ø)
server/etcdserver/api/v2store/metrics.go	92.00% <ø> (ø)
server/etcdserver/api/v3rpc/metrics.go	100.00% <ø> (ø)
server/etcdserver/apply/metrics.go	100.00% <ø> (ø)
server/etcdserver/metrics.go	80.43% <ø> (ø)
server/etcdserver/txn/metrics.go	100.00% <ø> (ø)
server/lease/metrics.go	100.00% <ø> (ø)
... and 1 more

... and 23 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #19301      +/-   ##
==========================================
- Coverage   68.84%   68.83%   -0.02%     
==========================================
  Files         420      420              
  Lines       35689    35689              
==========================================
- Hits        24570    24565       -5     
- Misses       9693     9694       +1     
- Partials     1426     1430       +4     

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[mmorel-35]

Have you seen https://golangci-lint.run/usage/linters/#promlinter ?

[ahrtr]

Have you seen https://golangci-lint.run/usage/linters/#promlinter ?

Can the linter resolve all the format "issues" updated in this PR?

[mmorel-35]

I have no clue but that's the only one I saw that concerns prometheus, Maybe they are open to adress your issues