KT-36956 fix back-end part in JVM and JVM_IR

PSI2IR: deparenthesize LHS expression when generating assignment
receiver.

FE: record 'set' operator call for code generation.

compiler/testData/codegen/box/increment/kt36956.kt

@@ -0,0 +1,11 @@
+class Cell(var x: Int) {
+    operator fun get(i: Int) = x
+    operator fun set(i: Int, v: Int) { x = v }
+}
+
+fun box(): String {
+    val c = Cell(0)
+    (c[0])++
+    if (c[0] != 1) return "Fail"
+    return "OK"
+}