KT-8794 Parameter Information should work in index expression

#KT-8794 Fixed

idea/testData/parameterInfo/functionCall/ExtensionOnClassObject.kt

@@ -0,0 +1,15 @@
+interface A
+
+fun A.foo(i: Int) = i
+
+class B {
+    companion object : A
+}
+
+fun test() {
+    B.foo(<caret>)
+}
+
+/*
+Text: (<highlight>i: Int</highlight>), Disabled: false, Strikeout: false, Green: true
+*/