refact: plugin config parsing

[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: Patch coverage is 77.77778% with 8 lines in your changes missing coverage. Please review.

Project coverage is 60.83%. Comparing base (d7d7e67) to head (a445d84).

Files with missing lines	Patch %	Lines
cmd/crowdsec-cli/clinotifications/notifications.go	33.33%	3 Missing and 1 partial ⚠️
pkg/csplugin/broker.go	86.66%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3640      +/-   ##
==========================================
- Coverage   60.83%   60.83%   -0.01%     
==========================================
  Files         372      372              
  Lines       40935    40944       +9     
==========================================
+ Hits        24903    24908       +5     
- Misses      13985    13986       +1     
- Partials     2047     2050       +3     

Flag	Coverage Δ
bats	44.59% <77.77%> (-0.02%)	⬇️
unit-linux	34.38% <52.77%> (-0.01%)	⬇️
unit-windows	24.33% <52.77%> (-0.02%)	⬇️

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