Rename receiver$0 in CallableReference to receiver

#KT-15449 Fixed

core/runtime.jvm/src/kotlin/jvm/internal/CallableReference.java

@@ -39,21 +39,21 @@ public abstract class CallableReference implements KCallable {
     //    objects are written to it. The latter is guaranteed because both KFunctionImpl and KPropertyImpl have at least one final field.
     private KCallable reflected;
 
-    protected final Object receiver$0;
+    protected final Object receiver;
     public static final Object NO_RECEIVER = new Object();
 
     public CallableReference() {
         this(NO_RECEIVER);
     }
 
-    protected CallableReference(Object receiver$0) {
-        this.receiver$0 = receiver$0;
+    protected CallableReference(Object receiver) {
+        this.receiver = receiver;
     }
 
     protected abstract KCallable computeReflected();
 
     public Object getBoundReceiver() {
-        return receiver$0;
+        return receiver;
     }
 
     public KCallable compute() {

core/runtime.jvm/src/kotlin/jvm/internal/MutablePropertyReference.java

@@ -22,7 +22,7 @@ public abstract class MutablePropertyReference extends PropertyReference impleme
     public MutablePropertyReference() {
     }
 
-    public MutablePropertyReference(Object receiver$0) {
-        super(receiver$0);
+    public MutablePropertyReference(Object receiver) {
+        super(receiver);
     }
 }

core/runtime.jvm/src/kotlin/jvm/internal/MutablePropertyReference0.java

@@ -24,8 +24,8 @@ public abstract class MutablePropertyReference0 extends MutablePropertyReference
     public MutablePropertyReference0() {
     }
 
-    public MutablePropertyReference0(Object receiver$0) {
-        super(receiver$0);
+    public MutablePropertyReference0(Object receiver) {
+        super(receiver);
     }
 
     @Override

core/runtime.jvm/src/kotlin/jvm/internal/MutablePropertyReference1.java

@@ -24,8 +24,8 @@ public abstract class MutablePropertyReference1 extends MutablePropertyReference
     public MutablePropertyReference1() {
     }
 
-    public MutablePropertyReference1(Object receiver$0) {
-        super(receiver$0);
+    public MutablePropertyReference1(Object receiver) {
+        super(receiver);
     }
 
     @Override

core/runtime.jvm/src/kotlin/jvm/internal/PropertyReference.java

@@ -24,8 +24,8 @@ public abstract class PropertyReference extends CallableReference implements KPr
         super();
     }
 
-    public PropertyReference(Object receiver$0) {
-        super(receiver$0);
+    public PropertyReference(Object receiver) {
+        super(receiver);
     }
 
     @Override

core/runtime.jvm/src/kotlin/jvm/internal/PropertyReference0.java

@@ -24,8 +24,8 @@ public abstract class PropertyReference0 extends PropertyReference implements KP
         super();
     }
 
-    public PropertyReference0(Object receiver$0) {
-        super(receiver$0);
+    public PropertyReference0(Object receiver) {
+        super(receiver);
     }
 
     @Override

core/runtime.jvm/src/kotlin/jvm/internal/PropertyReference1.java

@@ -23,8 +23,8 @@ public abstract class PropertyReference1 extends PropertyReference implements KP
     public PropertyReference1() {
     }
 
-    public PropertyReference1(Object receiver$0) {
-        super(receiver$0);
+    public PropertyReference1(Object receiver) {
+        super(receiver);
     }
 
     @Override