Update to .NET 8 and PS SDK 7.4

[JohnMcPMS]

Change

.NET 6 and PowerShell SDK 7.2 are no longer supported. This change updates the uses of the PowerShell SDK to 7.4 and all .NET 6 projects to .NET 8.

Validation

winget.exe configuration via the dev package and the PS modules locally.
The pipeline should cover the rest of the affected scenarios.

Microsoft Reviewers: Open in CodeFlow

[florelis]

I still see some 6.0.* dependencies in the CG report. I also see one with 7.2.* that seems related to PS. Are these supposed to still be there?

--- Component: ---
System.Diagnostics.EventLog 6.0.0 - NuGet
--- Found at: ---
/s/src/WinGetUtilInterop.UnitTests/WinGetUtilInterop.UnitTests.csproj

--- Component: ---
System.Security.AccessControl 6.0.1 - NuGet
--- Found at: ---
/s/src/Microsoft.Management.Configuration.Processor/Microsoft.Management.Configuration.Processor.csproj
/s/src/AppInstallerCLIE2ETests/AppInstallerCLIE2ETests.csproj
/s/src/Microsoft.Management.Configuration.UnitTests/Microsoft.Management.Configuration.UnitTests.csproj

--- Component: ---
Microsoft.PowerShell.MarkdownRender 7.2.1 - NuGet
--- Found at: ---
/s/src/Microsoft.Management.Configuration.Processor/Microsoft.Management.Configuration.Processor.csproj
/s/src/AppInstallerCLIE2ETests/AppInstallerCLIE2ETests.csproj
/s/src/Microsoft.Management.Configuration.UnitTests/Microsoft.Management.Configuration.UnitTests.csproj

[florelis]

I'm guessing these are the ones we were manually updating due to CVEs? Maybe we should start marking them so that we know they can be removed after updating the root dependency

[JohnMcPMS]

I believe so; I didn't trace the git history to confirm that.

The build was mad at me for having them, so I cut anything else that was System.* and version 6.*.

[JohnMcPMS]

System.Diagnostics.EventLog 6.0.0 - NuGet

Included via Moq, which does not have a .NET 8 targeting package. It has .NET Standard 2.0 though.

System.Security.AccessControl 6.0.1 - NuGet
Microsoft.PowerShell.MarkdownRender 7.2.1 - NuGet

These are the maximum versions, included by the 7.4 SDK and targeting .NET Standard 2.0.