feat(waf): add new check `waf_global_rule_with_conditions`

[HugoPBrito]

Context

AWS WAF Classic global rules are used to manage and control web traffic by specifying conditions that determine how the firewall handles requests. These conditions help identify, inspect, and mitigate potential security threats, such as malicious or suspicious traffic, thereby improving the overall security posture. Without any conditions in place, web traffic flows freely, which can lead to vulnerabilities being exploited, bypassing security policies.

Description

This check ensures that AWS WAF Classic global rules contain at least one condition. If no conditions are present, the rule becomes ineffective, allowing all traffic to pass unchecked.

Checklist

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

Codecov Report

Attention: Patch coverage is 92.85714% with 6 lines in your changes missing coverage. Please review.

Project coverage is 89.59%. Comparing base (23a20a5) to head (829b485). Report is 1163 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5465      +/-   ##
==========================================
+ Coverage   89.45%   89.59%   +0.14%     
==========================================
  Files        1059     1070      +11     
  Lines       32855    33172     +317     
==========================================
+ Hits        29390    29721     +331     
+ Misses       3465     3451      -14     

Components	Coverage Δ
prowler	89.59% <92.85%> (+0.14%)	:arrow_up:
api	∅ <ø> (∅)