In this PR, we

• Fix issue with dispatch to implementations of virtual interface members for generics.
• Make support for virtual dispatch of operators (Operators are now considered Overridables).

From C# 11 it is possible to declare abstract and virtual operators (see the example below), which means that operator calls no longer only have static call targets. We have implemented support for dynamic call targeting for operators in C#.

public interface I<T> where T : I<T>
{
    static abstract T operator +(T x, T y);
    static virtual T operator -(T x, T y) => throw null;
}

public class C : I<C>
{
    public static C operator +(C x, C y) => throw null;
    public static C operator /(C x, C y) => throw null;
}