Update sandbox dsc sample to use Repair-WinGetPackageManager

[mdanish-kh]

Summary of the pull request

The existing PowerShell script does not work for the latest version of WinGet. This is because VCLibs team has deprecated the Installer URL (microsoft/winget-cli#4778) and no longer publish the latest version of VCLibs on the URL (WinGet uses VCLibs as a dependency). Updating the script to install Microsoft.WinGet.Client PowerShell module & use Repair-WinGetPackageManager cmdlet to bootstrap WinGet.

References and relevant issues

Detailed description of the pull request / Additional comments

This will unblock winget configure https://aka.ms/sandbox.dsc.yaml

Validation steps performed

Manually validated the sandbox.dsc.yaml script with winget configure. The configuration successfully installs the latest version of WinGet

PR checklist

• Closes #xxx
• Tests added/passed
• Documentation updated

[mdanish-kh]

@denelon - I wasn't able to successfully run the full.sandbox.dsc.yaml configuration. It gets stuck on Apply :: WindowsOptionalFeature [WindowsSandbox], but that's not related to the changes here. The configuration doesn't run for me without these changes as well

Manually validated the sandbox.dsc.yaml configuration tho, and it successfully installs the latest WinGet

[denelon]

The issue with the "full" version is related to how DISM is called as a nested dependency. It's an OS related issue being fixed in newer versions of Windows. The only workaround I've found is to use "unpackaged" PowerShell 7 (an MSI based install) and then call it via Get-WinGetConfiguration -File <path> | Invoke-WinGetConfiguration.

[mdanish-kh]

The issue with the "full" version is related to how DISM is called as a nested dependency. It's an OS related issue being fixed in newer versions of Windows. The only workaround I've found is to use "unpackaged" PowerShell 7 (an MSI based install) and then call it via Get-WinGetConfiguration -File <path> | Invoke-WinGetConfiguration.

I see, I'm able to successfully run & validate the full version with the suggested approach

[mdanish-kh]

This sample was updated in microsoft/winget-dsc#133