feat(terraform): Create checks for aws managed admin policy

[bkblanton]

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Description

Previous PR was closed because it contained unrelated commits. See: #3636

Creates checks CKV_AWS_273 and CKV_AWS_274 that disallow IAM roles and policies from using the AWS managed AdministratorAccess policy.

• The IAMManagedAdminPolicy resource check disallows users from attaching the AWS AdministratorAccess policy to a role, user, or group.
• The IAMManagedAdminPolicy data check disallows users from creating a data source for the AWS AdministratorAccess policy. (See this stackoverflow.)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my feature, policy, or fix is effective and works
• New and existing tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[nimrodkor]

Very nice, TY!

[gruebel]

great work, thanks 🏆