new inference: array constructor refs are always exact (IDEA-115725)

(cherry picked from commit 0f6538fc54bbee0aaf6cbab9884c0407937d4568)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/methodRef/ExactReferencesToArrayCreation.java

@@ -0,0 +1,14 @@
+public class InspectorTest {
+    interface Stream<T> {
+        <A> A[] toArray(IntFunction<A[]> generator);
+    }
+    interface IntFunction<R> {
+        R apply(int value);
+    }
+
+    public static void main(Stream<Object> objectStream){
+        varargMethod(String[]::new,
+                     objectStream.toArray(String[]::new));
+    }
+    public static <T> void varargMethod(IntFunction<T[]> generator,T[]... a){}
+}