Put 'thisReceiver' declaration in class

Interfaces also have 'thisReceiver'

compiler/testData/ir/irText/classes/abstractMembers.txt

@@ -1,6 +1,6 @@
 FILE /abstractMembers.kt
   CLASS CLASS AbstractClass
-    $new: VALUE_PARAMETER this@AbstractClass: AbstractClass
+    $this: VALUE_PARAMETER this@AbstractClass: AbstractClass
     CONSTRUCTOR public constructor AbstractClass()
       BLOCK_BODY
         DELEGATING_CONSTRUCTOR_CALL 'constructor Any()'
@@ -20,6 +20,7 @@ FILE /abstractMembers.kt
     FUN FAKE_OVERRIDE public open override fun hashCode(): kotlin.Int
     FUN FAKE_OVERRIDE public open override fun toString(): kotlin.String
   CLASS INTERFACE Interface
+    $this: VALUE_PARAMETER this@Interface: Interface
     FUN public abstract fun abstractFun(): kotlin.Unit
       $this: VALUE_PARAMETER this@Interface: Interface
     PROPERTY public abstract val abstractVal: kotlin.Int