Always generate temporary variables for receivers in a property compound assignment

(emulate 'resolve' behavior).

compiler/testData/ir/irText/expressions/complexAugmentedAssignment.kt

@@ -0,0 +1,20 @@
+object X1 {
+    var x1 = 0
+    object X2 {
+        var x2 = 0
+        object X3 {
+            var x3 = 0
+        }
+    }
+}
+
+fun test1(a: IntArray) {
+    var i = 0
+    a[i++]++
+}
+
+fun test2() {
+    X1.x1++
+    X1.X2.x2++
+    X1.X2.X3.x3++
+}