refact "cscli metrics" part 1

[mmetc]

No description provided.

[github-actions]

@mmetc: There are no area labels on this PR. You can add as many areas as you see fit.

• /area agent
• /area local-api
• /area cscli
• /area appsec
• /area security
• /area configuration

Details

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[codecov]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (4160bb8) 57.27% compared to head (180fcfb) 57.28%.

Files	Patch %	Lines
cmd/crowdsec-cli/metrics_table.go	54.54%	1 Missing and 4 partials ⚠️
cmd/crowdsec-cli/metrics.go	93.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2805      +/-   ##
==========================================
+ Coverage   57.27%   57.28%   +0.01%     
==========================================
  Files         238      238              
  Lines       30589    30590       +1     
==========================================
+ Hits        17521    17525       +4     
+ Misses      11417    11415       -2     
+ Partials     1651     1650       -1     

Flag	Coverage Δ
bats	37.04% <83.72%> (-0.01%)	⬇️
unit-linux	52.24% <ø> (ø)
unit-windows	47.76% <ø> (ø)

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