Update win-ignoreAllFailures.ps1 to v1.2

[anmocanu]

.VERSION
v1.2: [May 2026] - Updated the script (current)
- Added guarded nested VM handling to prevent Get-VM failures when Hyper-V module is unavailable.
- Switched partition discovery from inline CIM enumeration to shared Get-Disk-Partitions-v2 helper.
- Added .SYNOPSIS header and aligned metadata versioning/documentation with current script behavior.
v1.1: [Apr 2026] - Enhanced CIM logic for disk enumeration and partition discovery
v1.0: Initial commit - Sets BCD boot status policy to IgnoreAllFailures to break Automatic Repair loops

[EdwinBernal1]

Issues Found

🟡 Side effect risk: temporary EFI letter assignment not cleaned up

The script mounts hidden EFI partitions with Set-Partition -NewDriveLetter but does not unassign them in cleanup. This can leave unexpected mounted system partitions on rescue hosts.

Recommendation: track newly assigned letters and remove them in finally.

🟢 Minor: hidden partition filter may miss null-letter cases

Filter uses DriveLetter -eq 0 for hidden partitions. Depending on object shape, unlettered partitions can appear as null rather than 0.

Recommendation: include null/empty checks (e.g., -not $_.DriveLetter).