[Bug] None of the string overloads of `EditorExtensionServiceProvider.GetService()` work on .NET.

None [^1] of the string overloads of EditorExtensionServiceProvider.GetService() work on .NET.

Reason: You cannot use Assembly.GetType(string) with an assembly-qualified name.

https://github.com/PowerShell/PowerShellEditorServices/blob/e124c135c6bcb95e94ca1ea7bc4ca032249e4572/src/PowerShellEditorServices/Extensions/Api/EditorExtensionServiceProvider.cs#L119

Affected:
https://github.com/PowerShell/PowerShellEditorServices/blob/e124c135c6bcb95e94ca1ea7bc4ca032249e4572/src/PowerShellEditorServices/Extensions/Api/EditorExtensionServiceProvider.cs#L85 https://github.com/PowerShell/PowerShellEditorServices/blob/e124c135c6bcb95e94ca1ea7bc4ca032249e4572/src/PowerShellEditorServices/Extensions/Api/EditorExtensionServiceProvider.cs#L97 https://github.com/PowerShell/PowerShellEditorServices/blob/e124c135c6bcb95e94ca1ea7bc4ca032249e4572/src/PowerShellEditorServices/Extensions/Api/EditorExtensionServiceProvider.cs#L112

I can submit a PR if that's desirable.

[^1]: Workaround for services in the Microsoft.PowerShell.EditorServices assembly: Pass a regular FullName (without assembly name) to GetServiceByAssemblyQualifiedName(string asmQualifiedTypeName).