Clean up MCM RBAC resource migrations

[georgibaltiev]

How to categorize this PR?

/area security
/kind cleanup
/platform aws

What this PR does / why we need it:

With the following PR, a migration runnable has been added to the PR, in order to remove RBAC resources that were no longer in use. These migrations were intended to be kept until the release of version 1.64.0.

This PR cleans up the migrations.

Which issue(s) this PR fixes:
NONE

Special notes for your reviewer:
NONE

Release note:

[github-actions]

The recent changes involve the removal of code related to RBAC purging for the AWS extension which was scheduled post the release of version 1.64.0. This cleanup enhances code maintainability by eliminating obsolete functionalities and tasks that are no longer required with the newer versions of the software, simplifying the extension's management process.

Walkthrough

• Refactor: Removed deprecated code responsible for purging RBAC resources related to the machine controller manager after version 1.64.0 release. This code's removal reflects the system's evolution and the migration to newer cleanup mechanisms or approaches, ensuring more efficient resource management.

_{Model: gpt-4o | Prompt Tokens: 1041 | Completion Tokens: 126}

[ialidzhikov]

/lgtm

[hebelsan]

/lgtm