KT-8794 Parameter Information should work in index expression

#KT-8794 Fixed

idea/testData/parameterInfo/arrayAccess/Set.kt

@@ -0,0 +1,12 @@
+class A {
+    operator fun get(x: Int) {}
+    operator fun set(x: String, y: Int, value: Int) {}
+
+    fun d(x: Int) {
+        this[<caret>] = 1
+    }
+}
+
+/*
+Text: (<highlight>x: String</highlight>, y: Int), Disabled: false, Strikeout: false, Green: true
+*/