Enable inlining of shared generics code within same type (#38229)

Enable inlining of shared generics code within same type (#38229)

This change allows inlining of generic dictionary lookups when the caller and callee are the same exact type and instantiation.

Example:

```
class G<T>
{
    static bool M1() => typeof(T);

    object M2() => new T[1];

    bool M3() => Unsafe.SizeOf<T>();

    static string M()
    {
         // Assume that T is string
         // All M1, M2, M3 are inlined after this change, but were not inlined before this change
         M1(); M2(); M3();

         // Still not inlined - different instantiation, not the same exact type
         G<List<T>>.M1();

         // Still not inlined - different type.
         OtherG<T>.M();
    }
}
```