feat(detect-secrets): get secrets plugins from config.yaml

[pedrooot]

Context

Fix #6522

Description

Make plugins from detect-secrets configurable.
Thanks @kagahd for the feature-request 🚀

Checklist

• Are there new checks included in this PR? Yes / No
  • If so, do we need to update permissions for the provider? Please review this carefully.
• Review if the code is being covered by tests.
• Review if code is being documented following this specification https://github.com/google/styleguide/blob/gh-pages/pyguide.md#38-comments-and-docstrings
• Review if backport is needed.
• Review if is needed to change the Readme.md

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.43%. Comparing base (9e7104f) to head (7d19b73).
Report is 23 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6544      +/-   ##
==========================================
- Coverage   89.89%   89.43%   -0.46%     
==========================================
  Files        1182     1182              
  Lines       35408    33839    -1569     
==========================================
- Hits        31829    30263    -1566     
+ Misses       3579     3576       -3     

Flag	Coverage Δ
prowler	89.43% <100.00%> (-0.46%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
prowler	89.43% <100.00%> (-0.46%)	⬇️
api	∅ <ø> (∅)

[kagahd]

I opened a Yelp/detect-secrets#910 to add a new detector for Aiven tokens. However, I doubt that it will be merged soon considering all the open, unmerged other PR's for new detectors.
Do you mind integrating the AivenTokenDetector into Prowler? It's just copying detect_secrets/plugins/aiven_token.py to the site-packages folder. That would save me patching the Prowler image.

[jfagoagas]

I think you should get the default list of plugins instead of None or {}. Please review it in all checks.

[pedrooot]

I agree with you, changes on the next commit.