enhance: container discovery via labels

[LaurenceJJones]

Fix #2957

Implement container auto discovery via labels set on the container

How to setup:

Add acquisition example:

##/etc/crowdsec/acquis.d/docker.yaml
source: docker
use_container_labels: true

Then you can launch containers using the following labels:

docker run -d -p 80:80 -l crowdsec.enable=true -l crowdsec.labels.type=nginx nginx:alpine

Under the hood it will check if crowdsec.enable=true is set before trying to parse the labels. If no labels are provided it errors as we need to type variables for the parsers.

[github-actions]

@LaurenceJJones: There are no 'kind' label on this PR. You need a 'kind' label to generate the release automatically.

• /kind feature
• /kind enhancement
• /kind refactoring
• /kind fix
• /kind chore
• /kind dependencies

Details

I am a bot created to help the crowdsecurity developers manage community feedback and contributions. You can check out my manifest file to understand my behavior and what I can do. If you want to use this for your project, you can check out the BirthdayResearch/oss-governance-bot repository.

[github-actions]

@LaurenceJJones: 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

I am a bot created to help the crowdsecurity developers manage community feedback and contributions. You can check out my manifest file to understand my behavior and what I can do. If you want to use this for your project, you can check out the BirthdayResearch/oss-governance-bot repository.

[LaurenceJJones]

/kind enhancement
/area agent

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 43.52941% with 48 lines in your changes are missing coverage. Please review.

Project coverage is 38.80%. Comparing base (defa076) to head (f81af59).
Report is 23 commits behind head on master.

Files	Patch %	Lines
pkg/acquisition/modules/docker/docker.go	14.28%	46 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #2959       +/-   ##
===========================================
+ Coverage   27.54%   38.80%   +11.26%     
===========================================
  Files         398      402        +4     
  Lines       57917    58322      +405     
===========================================
+ Hits        15953    22634     +6681     
+ Misses      40025    33195     -6830     
- Partials     1939     2493      +554     

Flag	Coverage Δ
bats	30.15% <0.00%> (?)
unit-linux	34.84% <42.02%> (-0.23%)	⬇️
unit-windows	25.58% <43.52%> (-0.01%)	⬇️

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[LaurenceJJones]

Updated config option to be use_container_labels since we already do auto discovery this is more explicit of what the option does

[LaurenceJJones]

Linked to #1435