chore: vendorize detect-secrets dependency

[sergargar]

Context

This PR resolves the PyPI upload issue caused by the use of a direct GitHub dependency for detect-secrets, which is not allowed by PyPI.

Description

• Vendorized detect-secrets: The library has been added to prowler/lib/detect-secrets to include the latest changes from the master branch, as the PyPI version is outdated.
• Updated pyproject.toml: The dependency is now referenced locally from prowler/lib/detect-secrets instead of GitHub.

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.

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 (23a20a5) to head (0e2fb9c).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5472      +/-   ##
==========================================
- Coverage   89.45%   89.43%   -0.02%     
==========================================
  Files        1059     1059              
  Lines       32855    32855              
==========================================
- Hits        29390    29385       -5     
- Misses       3465     3470       +5     

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