Support out and ref dynamic for more types than just object and dynamic

[YairHalberstadt]

Currently dynamic will fail at runtime for cases like these:

public class C
{
    public void M(out int a) => a = 42;
}
...
dynamic d1 = new C();
d1.M(out dynamic d2);

This is because like all ref calls, the type of the argument must exactly match the type of the parameter.

Currently there is no obvious way around this that I can think of if the types are not known at compile time.

As such, if there is a reasonable way around this using reflection, I think it would be super useful to encapsulate this in dynamic.

For a case where this is causing issues, see this issue in Roslyn: dotnet/roslyn#32709