Add JetMultiDeclarationReference

A reference to component* functions

idea/testData/resolve/referenceWithLib/multiDeclarationWithTypeParameters.kt

@@ -0,0 +1,13 @@
+package test
+
+import dependency.*
+
+fun <Int> f(l: List<Int>) {
+    val (e<caret>l1, el2, el3) = l
+}
+
+// MULTIRESOLVE
+// REF: (for kotlin.List<T> in dependency).component1()
+// REF: (for kotlin.List<T> in dependency).component2()
+// REF: (for kotlin.List<T> in dependency).component3()
+

idea/testData/resolve/referenceWithLib/multiDeclarationWithTypeParametersSrc/multiDeclarationWithTypeParametersDependency.kt

@@ -0,0 +1,5 @@
+package dependency
+
+fun <T> List<T>.component1() = get(0)
+fun <T> List<T>.component2() = get(1)
+fun <T> List<T>.component3() = get(2)