clipapi: replace tomb with errgroup

[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

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 62.98%. Comparing base (6e7fc85) to head (fa608eb).

Files with missing lines	Patch %	Lines
cmd/crowdsec-cli/clipapi/papi.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4207      +/-   ##
==========================================
- Coverage   63.01%   62.98%   -0.04%     
==========================================
  Files         470      470              
  Lines       33453    33453              
==========================================
- Hits        21082    21070      -12     
- Misses      10245    10252       +7     
- Partials     2126     2131       +5     

Flag	Coverage Δ
bats	46.09% <0.00%> (-0.03%)	⬇️
unit-linux	35.90% <0.00%> (-0.09%)	⬇️
unit-windows	24.35% <0.00%> (-0.01%)	⬇️

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