Control-Flow: Generate instruction for left-hand side of invalid assignments

#KT-8390 Fixed

compiler/testData/diagnostics/tests/LValueAssignment.kt

@@ -39,7 +39,7 @@ class D() {
 fun foo(): Unit {}
 
 fun cannotBe() {
-    var <!UNUSED_VARIABLE!>i<!>: Int = 5
+    var i: Int = 5
 
     <!UNRESOLVED_REFERENCE!>z<!> = 30;
     <!VARIABLE_EXPECTED!>""<!> = "";
@@ -135,4 +135,4 @@ fun Array<Int>.checkThis() {
 
 abstract class Ab {
     abstract fun getArray() : Array<Int>
-}
+}

compiler/testData/diagnostics/tests/UnusedParameters.kt

@@ -26,3 +26,7 @@ fun get(p: Any) {
 
 fun set(p: Any) {
 }
+
+fun foo(s: String) {
+    s.<!UNRESOLVED_REFERENCE!>xxx<!> = 1
+}

compiler/testData/diagnostics/tests/UnusedParameters.txt

@@ -1,6 +1,7 @@
 package
 
 internal fun f(/*0*/ a: kotlin.Int, /*1*/ b: kotlin.Int, /*2*/ c: kotlin.Int = ...): kotlin.Unit
+internal fun foo(/*0*/ s: kotlin.String): kotlin.Unit
 internal fun get(/*0*/ p: kotlin.Any): kotlin.Unit
 internal fun set(/*0*/ p: kotlin.Any): kotlin.Unit
 internal fun kotlin.Any.get(/*0*/ thisRef: kotlin.Any?, /*1*/ prop: kotlin.PropertyMetadata): kotlin.String