"field": deprecated warnings introduced, compiler tests migrated to the new syntax

compiler/testData/diagnostics/tests/backingField/CustomGetSet.kt

@@ -1,7 +1,11 @@
 class Flower() {
 
     var minusOne: Int = 1
-        get() = $minusOne + 1
-        set(n: Int) { $minusOne = n - 1 }
+        get() = field + 1
+        set(n: Int) { field = n - 1 }
+
+    var oldSyntax: Int = 1
+        get() = <!BACKING_FIELD_SYNTAX_DEPRECATED!>$oldSyntax<!> - 1
+        set(arg) { <!BACKING_FIELD_SYNTAX_DEPRECATED!>$oldSyntax<!> = arg + 1 }
 
 }

compiler/testData/diagnostics/tests/backingField/CustomGetSet.txt

@@ -3,6 +3,7 @@ package
 public final class Flower {
     public constructor Flower()
     public final var minusOne: kotlin.Int
+    public final var oldSyntax: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String

compiler/testData/diagnostics/tests/backingField/CustomGetVal.kt

@@ -1,4 +1,4 @@
 class CustomGetVal() {
     val zz = 1
-        get() = $zz * 2
+        get() = field * 2
 }

compiler/testData/diagnostics/tests/backingField/CustomGetValGlobal.kt

@@ -1,3 +1,3 @@
 package customGetValGlobal
     val zz = 1
-        get() = $zz * 2
+        get() = field * 2

compiler/testData/diagnostics/tests/backingField/CustomGetVar.kt

@@ -1,4 +1,4 @@
 class Raise() {
     var zz = 1
-        get() = $zz * 2
+        get() = field * 2
 }

compiler/testData/diagnostics/tests/backingField/CustomSet.kt

@@ -1,4 +1,4 @@
 class Raise() {
     var zz = 1
-        set(it) { $zz = it / 2 }
+        set(it) { field = it / 2 }
 }

compiler/testData/diagnostics/tests/backingField/kt462BackingFieldsResolve.kt

@@ -27,7 +27,7 @@ abstract class TestInitializationWithoutBackingField() {
 
     var varWithCustomSetter : Int
     set(v: Int) {
-        $varWithCustomSetter = v
+        field = v
     }
     init {
         <!INITIALIZATION_USING_BACKING_FIELD_CUSTOM_SETTER!>varWithCustomSetter<!> = 3
@@ -70,7 +70,7 @@ abstract class TestInitializationThroughBackingField() {
 
     var varWithCustomSetter : Int
     set(v: Int) {
-        $varWithCustomSetter = v
+        field = v
     }
     init {
         $varWithCustomSetter = 3
@@ -114,7 +114,7 @@ class TestBackingFieldsVisibility() {
     }
 
     <!ABSTRACT_PROPERTY_IN_NON_ABSTRACT_CLASS!>abstract<!> val w = 11
-    get() = $w //test there is no second error here
+    get() = field //test there is no second error here
 }
 
 val topLevelVar = 11
@@ -141,10 +141,10 @@ class T() {
     get() {
         val <!UNUSED_VARIABLE!>o<!> = object {
             init {
-                $x = 34
+                field = 34
             }
             fun foo() {
-                $x = 23
+                field = 23
             }
         }
         return 1
@@ -153,10 +153,10 @@ class T() {
     var r: Int = $x
     set(v: Int) {
         if (true) {
-            $r = 33
+            field = 33
         }
         else {
-            $r = 35
+            field = 35
         }
     }
 

compiler/testData/diagnostics/tests/backingField/kt782packageLevel.kt

@@ -6,7 +6,7 @@ val z : Int = 34
 
 val y : Int = 11
 get() {
-    return $y
+    return field
 }
 
 val x : Int