[Merged by Bors] - use zap in sql/metrics

[poszu]

Motivation

Part of the effort to migrate to zap.

Description

Test Plan

existing tests pass

TODO

• Explain motivation or link existing issue(s)
• Test changes and document test plan
• Update documentation as needed
• Update changelog as needed

[codecov]

Codecov Report

Attention: Patch coverage is 36.36364% with 7 lines in your changes missing coverage. Please review.

Project coverage is 82.1%. Comparing base (88ba729) to head (1025e2b).
Report is 1 commits behind head on develop.

Files	Patch %	Lines
sql/metrics/prometheus.go	0.0%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #6238     +/-   ##
=========================================
- Coverage     82.1%   82.1%   -0.1%     
=========================================
  Files          308     308             
  Lines        34066   34067      +1     
=========================================
  Hits         27976   27976             
- Misses        4314    4318      +4     
+ Partials      1776    1773      -3     

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[poszu]

bors merge

[spacemesh-bors]

Pull request successfully merged into develop.

Build succeeded:

• ci-status
• systest-status