JCore brownfield app attach vm fix script for tools setup

[JCoreMS]

Overview/Summary

Updated PowerShell script for post VM deployment to correct issue with MSIX App Attach tool not installing. Added update notes to PowerShell Header and included MSIX Tools Driver as part of installation. This addresses bug #675.

This PR fixes/adds/changes/removes

1. Add - Now installs the MSIX Tools Driver which is a pre-req for the tools
2. Remove - PSFT tooling no longer needed as it's incorporated into the Microsoft MSIX Tools

Breaking Changes

1. N/A

Testing Evidence

Tested from own repository changing the Script URI to use an alternate location.

As part of this Pull Request I have

• [X] Read the Contribution Guide and ensured this PR is compliant with the guide
• [X] Ensured the resource API versions in .bicep file/s I am adding/editing are using the latest API version possible
• [X] Checked for duplicate Pull Requests
• [X] Associated it with relevant GitHub Issues
• [X] (AVD LZA Team Only) Associated it with relevant ADO Items
• [X] Ensured my code/branch is up-to-date with the latest changes in the main branch
• [X] Performed testing and provided evidence.
• [X] Updated relevant and associated documentation (e.g. Contribution Guide, Module READMEs, Docs etc.)