Support new double colon expressions in IDE code

idea/testData/findUsages/libraryUsages/kotlinLibrary/LibraryClassUsages.results.txt

@@ -10,6 +10,7 @@
 [LibraryClassUsages.1.java] Usage in extends/implements clause 5 class J extends A {
 [library.kt] Nested class/object 63 val t = A.T(1)
 [library.kt] Nested class/object 64 val tt = A.T()
+[library.kt] Nested class/object 66 val fff = A.T::bar
 [library.kt] New instance creation 57 val a = A(1)
 [library.kt] New instance creation 58 val aa = A()
 [library.kt] Supertype 19 class B: A {
@@ -21,4 +22,3 @@
 [library.kt] Supertype 39 class CC(): A() {
 [library.kt] Supertype 40 class VV(): A.T()
 [library.kt] Unclassified usage 61 val ff = A::foo
-[library.kt] Unclassified usage 66 val fff = A.T::bar