Add "Suspicious collection reassignment" inspection #KT-20626 Fixed

idea/testData/quickfix/suspiciousCollectionReassignment/joinWithInitializer/simple.kt.after

@@ -0,0 +1,9 @@
+// "Join with initializer" "true"
+// TOOL: org.jetbrains.kotlin.idea.inspections.SuspiciousCollectionReassignmentInspection
+// WITH_RUNTIME
+fun test(otherList: List<Int>) {
+    var list = createList() + otherList<caret>
+    // comment
+}
+
+fun createList(): List<Int> = listOf(1, 2, 3)