[FIR] drop redundant receiver copy

^KT-54417

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/FirReceiverParameter.kt

@@ -29,6 +29,8 @@ abstract class FirReceiverParameter : FirPureAbstractElement(), FirAnnotationCon
     override fun <E: FirElement, D> transform(transformer: FirTransformer<D>, data: D): E = 
         transformer.transformReceiverParameter(this, data) as E
 
+    abstract fun replaceType(newType: FirTypeRef)
+
     abstract fun <D> transformType(transformer: FirTransformer<D>, data: D): FirReceiverParameter
 
     abstract override fun <D> transformAnnotations(transformer: FirTransformer<D>, data: D): FirReceiverParameter

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/impl/FirReceiverParameterImpl.kt

@@ -43,4 +43,8 @@ internal class FirReceiverParameterImpl(
         annotations.transformInplace(transformer, data)
         return this
     }
+
+    override fun replaceType(newType: FirTypeRef) {
+        type = newType
+    }
 }

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/NodeConfigurator.kt

@@ -394,7 +394,7 @@ object NodeConfigurator : AbstractFieldConfigurator<FirTreeBuilder>(FirTreeBuild
         }
 
         receiverParameter.configure {
-            +field("type", typeRef).withTransform()
+            +field("type", typeRef).withTransform().withReplace()
             +annotations
         }