feat(aws): add new check iam_root_credentials_management_enabled

[MrCloudSec]

Context

Centralized root credentials management in AWS Organizations is critical for securing root access across member accounts. When this new feature is enabled, member accounts no longer have direct control over their root credentials, mitigating risks associated with root misuse or compromise. See more info about this new feature in https://docs.aws.amazon.com/IAM/latest/UserGuide/id_root-user.html#id_root-user-access-management.

Description

This PR introduces a new check, iam_root_credentials_management_enabled, to verify if centralized root credentials management is enabled. Additionally:

• The checks iam_root_hardware_mfa_enabled, iam_no_root_access_key, and iam_root_mfa_enabled have been updated to skip findings if centralized root credentials management is active, as root credentials are no longer directly managed by member accounts.

• The organizations attribute was converted to a single organization attribute since there is only a single organization per AWS account.

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

Attention: Patch coverage is 95.27027% with 7 lines in your changes missing coverage. Please review.

Project coverage is 89.90%. Comparing base (78b518e) to head (1d5bb2f).

Files with missing lines	Patch %	Lines
...dware_mfa_enabled/iam_root_hardware_mfa_enabled.py	89.47%	2 Missing ⚠️
prowler/providers/aws/services/iam/iam_service.py	86.66%	2 Missing ⚠️
...ny_regions/organizations_scp_check_deny_regions.py	83.33%	2 Missing ⚠️
...ws/services/organizations/organizations_service.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5801      +/-   ##
==========================================
+ Coverage   89.88%   89.90%   +0.02%     
==========================================
  Files        1132     1133       +1     
  Lines       35275    35308      +33     
==========================================
+ Hits        31707    31744      +37     
+ Misses       3568     3564       -4     

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