Overload resolution chooses wrong overload for FormatableString

[popcatalin81]

Version Used: 7.1

The following snippet shows how using a formattable string uses the wrong overload of write:

class Program {
	static void Main()
	{
		Write($"Hello there {DateTime.Now}");	
	}
	static void Write(string text)
	{
		Console.WriteLine("unformated");
	}
	
	static void Write(FormattableString text)
	{
		Console.WriteLine("formated");
	}
}

Expected Behavior:
formatted

Actual Behavior:
unformatted

As a note explicitly casting the formattable string to FormatableString produces the correct results:

[jnm2]

Duplicate of #675.