... if the delegate happens to be a function call whose second
argument is a callable reference but not actually a provideDelegate
call.
The fix is to ensure that the call is _actually_ a desugared
provideDelegate call.
This fixes a CCE in a case where the delegate expression is a regular
function call and the second argument is a callable reference.
#KT-65165 Fixed
Kirill Rakhman
853ad54699