Add AppFlows Failover Cleanup script

[oktain89]

Description

This PR adds a new script that may be used after executing a Blueprint Failover (real; not test) that leaves behind VMs that are renamed with Deprecated_. This script may be used to remove all of them when the user is ready to cleanup.

Related Issue

This project only accepts pull requests related to open issues.

• If suggesting a new feature or change, please discuss it in an issue first.
• If fixing a bug, there should be an issue describing it with steps to reproduce

Please link to the issue here

Motivation and Context

There is currently no solution in AppFlows to remove the deprecated VMs, so this script fills that gap.

How Has This Been Tested?

The script has been tested in the Rangers/RTT Labs using the stable AppFlows demo environment. No issues were identified during this testing.

Screenshots (if appropriate):

Types of changes

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

Go over all the following points, and put an x in all the boxes that apply. If you're unsure about any of these, don't hesitate to ask. We're here to help!

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTION document.
• I have updated the CHANGELOG file accordingly for the version that this merge modifies.
• I have added tests to cover my changes.
• All new and existing tests passed.