Recursive type substitution in TypeLibrary.MakeGenericType

[Manonox]

Fixes: Facepunch/sbox-issues#9813
(Look there for details)

There's also a new test:

[TestMethod]
public void ObeyRecursiveGenericConstraints()
{
	var tl = new Sandbox.Internal.TypeLibrary();
	tl.AddAssembly( ThisAssembly, true );

	var goodboy = tl.GetType( typeof( ConstraintBreaker2<> ) )
								.CreateGeneric<ConstraintBreaker2TypeErased>( [typeof( ConstraintBreaker2Inner )] );
	Assert.IsNotNull( goodboy );

	var badboy = tl.GetType( typeof( ConstraintBreaker2<> ) )
								.CreateGeneric<ConstraintBreaker2TypeErased>( [typeof( TypeWrapper )] );
	Assert.IsNull( badboy );
}

public class ConstraintBreaker2Inner :
	IConstraintBreaker2<
		ConstraintBreaker2Inner,
		ConstraintBreaker2Inner,
		ConstraintBreaker2Inner
	>
{
	public void DoSomething( ConstraintBreaker2Inner value )
	{

	}

	public void DoSomething2( ConstraintBreaker2Inner value )
	{

	}

	public void DoSomething3( ConstraintBreaker2Inner value )
	{

	}
}

public class ConstraintBreaker2TypeErased { }

[Expose]
public class ConstraintBreaker2<T> : ConstraintBreaker2TypeErased where T : IConstraintBreaker2<T, T, T>
{
	public void DoSomething( T value )
	{
		value.DoSomething( value );
		value.DoSomething2( value );
		value.DoSomething3( value );
	}
}