Hard crash with `func start` using .NET 8 preview 5

Follow the preview instructions but use .NET 8 preview 5 via
```powershell
winget install --id Microsoft.DotNet.SDK.Preview
func start
```

The result is this hard crash:
Core Tools Version: 4.0.5210 Commit hash: N/A (64-bit)
Function Runtime Version: 4.21.1.20667
[2023-06-19T21:59:36.855Z] Language Worker Process exited. Pid=16800.
[2023-06-19T21:59:36.856Z] C:\Program Files\dotnet\dotnet.exe exited with code -532462766 (0xE0434352). Unhandled exception. System.TypeInitializationException: The type initializer for 'System.Management.Automation.PSVersionInfo' threw an exception.

Could we please trap this error and return more reasonable message like ".NET 8 Preview 1-4 is required but not found"

Start by reproducing the crash with .NET 8 preview 5 using the reported winget install command and func start entry point, then review how the PowerShell worker handles the reported System.TypeInitializationException. Done means the failure is trapped and produces a clear message about the supported .NET 8 preview versions instead of terminating with the hard crash.

Written by the indexing model from the issue text.