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

idea/testData/inspectionsLocal/suspiciousCollectionReassignment/hasError.kt

@@ -0,0 +1,7 @@
+// PROBLEM: none
+// WITH_RUNTIME
+// ERROR: Type mismatch: inferred type is List<Any> but List<String> was expected
+fun test() {
+    var list = listOf("")
+    list <caret>+= 1
+}