Optimization: Modernize Create-ImageVirtualDisk using native PowerShell cmdlets

[msancaktutan]

Description:
This PR optimizes the Create-ImageVirtualDisk function to improve reliability, performance, and modernization of the codebase.

Changes:

• Replaced Regex parsing: Switched from parsing physical drive strings (which can be risky on different hardware) to using Get-DiskImage | Get-Disk for 100% accurate disk detection.
• Removed external dependency: Replaced the legacy format.com call with the native Format-Volume PowerShell cmdlet for faster execution and better error handling.
• Added Retry Logic: Implemented Execute-Retry during disk detection to handle potential OS delays when attaching VHDs.
• Code Cleanup: Improved logging and resource cleanup (closing handles).

Tested on Windows Server 2016/2019/2022/2025