Put 'thisReceiver' declaration in class

Interfaces also have 'thisReceiver'

compiler/testData/ir/irText/singletons/object.txt

@@ -1,6 +1,6 @@
 FILE /object.kt
   CLASS OBJECT Z
-    $new: VALUE_PARAMETER this@Z: Z
+    $this: VALUE_PARAMETER this@Z: Z
     CONSTRUCTOR private constructor Z()
       BLOCK_BODY
         DELEGATING_CONSTRUCTOR_CALL 'constructor Any()'
@@ -9,7 +9,7 @@ FILE /object.kt
       $this: VALUE_PARAMETER this@Z: Z
       BLOCK_BODY
     CLASS CLASS A
-      $new: VALUE_PARAMETER this@A: A
+      $this: VALUE_PARAMETER this@A: A
       CONSTRUCTOR public constructor A()
         BLOCK_BODY
           DELEGATING_CONSTRUCTOR_CALL 'constructor Any()'