[Deprecation] Deprecated - AWS Root Login Without MFA

[imays11]

Pull Request

Issue link(s):

• https://github.com/elastic/ia-trade-team/issues/616
• [Rule Tuning][Deprecation] AWS Root Console Login Rules #5201

Summary - What I changed

Completing Deprecation Process for this rule. It has now been included in our ruleset with Deprecated - prefix for 2 release cycles and should now be moved to our _deprecated folder.

[github-actions]

Rule: Deprecation - Guidelines

These guidelines serve as a reminder set of considerations when recommending the deprecation of a rule.

Documentation and Context

• Description of the reason for deprecation.
• Include any context or historical data supporting the deprecation decision.

Rule Metadata Checks

• deprecated = true added to the rule metadata.
• updated_date should be the date of the PR.

Testing and Validation

• A prior rule tuning occurred for the rule where Deprecated - is prepended to the rule name, and the rule has already been released.
• Rule has be moved to the _deprecated directory.
• Double check gaps potentially or inadvertently introduced.
• Provide evidence that the rule is no longer needed or has been replaced (e.g., alternative rules, updated detection methods).