feat(waf): add new check waf_regional_rule_with_conditions

[HugoPBrito]

Context

AWS WAF Classic Regional rules allow users to define specific conditions for monitoring and controlling HTTP(S) requests in their region-based applications. A rule should include at least one condition, such as inspecting the origin, headers, or body of requests, to perform the intended action, like blocking or allowing traffic. Ensuring that WAF rules are not empty is vital for the security and functionality of these applications.

Description

This check verifies whether an AWS WAF Classic Regional rule contains at least one condition. The check fails if no conditions are present within the rule.

Checklist

• Are there new checks included in this PR? Yes.
  • If so, do we need to update permissions for the provider? No.
• 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 89.29%. Comparing base (9d97b1a) to head (e20097f).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5411      +/-   ##
==========================================
+ Coverage   89.22%   89.29%   +0.07%     
==========================================
  Files        1047     1048       +1     
  Lines       32423    32441      +18     
==========================================
+ Hits        28929    28969      +40     
+ Misses       3494     3472      -22     

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