add SetMeta and SetParsed helpers

[buixor]

evt.SetMeta(key, value) and evt.SetParsed(key, value) allow scenarios to alter the event object for better (tm) scenarios:

type: trigger
name: crowdsecurity/http-trendy-cve-watch
data:
  - dest_file: http-trendy-cve.txt
    type: string
description: "blah"
filter: |
  let lowered_url = Lower(evt.Meta.http_path);
  evt.Meta.log_type in ['http_access-log', 'http_error-log'] and
  evt.Meta.http_status in ['404', '403'] and
  any( File('http-trendy-cve.txt'), 
      {
       let stuff = Split(#, ':');
       lowered_url contains stuff[1] && evt.SetMeta('CVE', stuff[0])
      })
...

http-trendy-cve.txt

#test
cve-2021-1234:/foobar
cve-2023-2313:/totolol
#
cve-2021-26086:/_/;/web-inf/web.xml

This would allow crowdsecurity/http-trendy-cve-watch scenario to watch for multiple vulnerabilities, adding the corresponding CVE name in Meta.CVE

[github-actions]

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

• /kind feature
• /kind enhancement
• /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]

@buixor: 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.

[buixor]

/kind enhancement
/area agent

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2bbf0b4) 57.97% compared to head (c3f23e5) 57.94%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2845      +/-   ##
==========================================
- Coverage   57.97%   57.94%   -0.03%     
==========================================
  Files         239      239              
  Lines       30949    30983      +34     
==========================================
+ Hits        17942    17954      +12     
- Misses      11380    11399      +19     
- Partials     1627     1630       +3     

Flag	Coverage Δ
bats	37.87% <0.00%> (-0.09%)	⬇️
unit-linux	52.37% <100.00%> (+<0.01%)	⬆️
unit-windows	47.83% <100.00%> (+<0.01%)	⬆️

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