Incorrect cast-can-be-removed suggestion with lambdas and implicit operators.

[CyrusNajmabadi]

From #71926

public class MyClass
{
    static void Main()
    {
        Foo f = (Action)(() => { }); // IDE0004: Cast is redundant.

    }
}

public class Foo
{
    public static implicit operator Foo(Action value)
    {
        return default!;
    }
}