Consider improving SA1316 behavior for element names in tuple expressions

[bjornhellander]

If SA1316 triggers in a tuple type, then the diagnostic is on the element name and a code fix is offered.

If it triggers in a tuple expression, then the diagnostic is instead on the value and no code fix is offered. If the element name has been explicitly stated, then I guess it could instead behave as for tuple types. That would feel more natural to me.

Tested using 1.1.0-alpha.1