ada: Crash on function returning empty Ada 2022 aggregate

ada: Crash on function returning empty Ada 2022 aggregate

The compiler crashes processing a function that returns an empty
aggregate when its returned type is a record type which defined
its container aggregate aspects.

gcc/ada/

	* exp_aggr.adb (Expand_Container_Aggregate): Report warning on
	infinite recursion if an empty container aggregate appears in the
	return statement of its Empty function. Fix typo in comment.
	* sem_aggr.adb (Resolve_Aggregate): Resolve Ada 2022 empty
	aggregate that initializes a record type that has defined its
	container aggregate aspects.
	(Resolve_Iterated_Association): Protect access to attribute Etype.
	* sem_ch13.adb (Resolve_Aspect_Aggregate): Fix typo in comment.