This uses the same approach as
INFERRED_TYPE_VARIABLE_INTO_EMPTY_INTERSECTION where we use a visitor
to find a call to a symbol that contains the type variable in question.
#KT-56140 Fixed
For explanation, see nestedPartiallyResolvedCallsSimple.k
The problem was caused by "select" variable is being leaked to the
inference session of delegate while it should not happen because
it doesn't belong to the common system of `KotlinVal { ..` call,
as we complete it with fixing `E` variable during completion
for `A(select(null, fun(): Int { return 1 }))`.
The root of the problem is that we were adding all the partial
nested calls to the session, while in fact we only need there
the top-level one.
^KT-57543 Fixed
This directive anyway does not make test run twice with OI, and with NI
It only once run the test with specific settings (// LANGUAGE)
and ignores irrelevant (OI or NI tags)
This commit adds diagnostics for the following
* DELEGATE_SPECIAL_FUNCTION_MISSING
* DELEGATE_SPECIAL_FUNCTION_AMBIGUITY
* DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE
Kirill Rakhman