HHH-18854 Revert changes for Hibernate Reactive

Because I didn't add a comment, some of the methods Hibernate Reactive
uses to plug in its classess, have been removed as a refactoring.

Author: DavideD

hibernate-core/src/main/java/org/hibernate/sql/results/graph/entity/internal/AbstractNonJoinedEntityFetch.java

@@ -142,11 +142,10 @@ public boolean isSelectByUniqueKey() {
 	public DomainResultAssembler<?> createAssembler(
 			InitializerParent<?> parent,
 			AssemblerCreationState creationState) {
-		final EntityInitializer<?> entityInitializer =
-				creationState.resolveInitializer( this, parent, this )
-						.asEntityInitializer();
+		final EntityInitializer<?> entityInitializer = creationState.resolveInitializer( this, parent, this )
+				.asEntityInitializer();
 		assert entityInitializer != null;
-		return new EntityAssembler<>( getFetchedMapping().getJavaType(), entityInitializer );
+		return buildEntityAssembler( entityInitializer );
 	}
 
 	@Override
@@ -160,4 +159,10 @@ public EntityInitializer<?> createInitializer(
 	@Override
 	public abstract EntityInitializer<?> createInitializer(InitializerParent<?> parent, AssemblerCreationState creationState);
 
+	/**
+	 * Used By Hibernate Reactive
+	 */
+	protected EntityAssembler<?> buildEntityAssembler(EntityInitializer<?> entityInitializer) {
+		return new EntityAssembler<>( getFetchedMapping().getJavaType(), entityInitializer );
+	}
 }

hibernate-core/src/main/java/org/hibernate/sql/results/graph/entity/internal/EntityFetchJoinedImpl.java

@@ -129,9 +129,14 @@ public FetchParent getFetchParent() {
 	public DomainResultAssembler<?> createAssembler(
 			InitializerParent<?> parent,
 			AssemblerCreationState creationState) {
-		return new EntityAssembler<>( getFetchedMapping().getJavaType(),
-				creationState.resolveInitializer( this, parent, this )
-						.asEntityInitializer() );
+		return buildEntityAssembler( creationState.resolveInitializer( this, parent, this ).asEntityInitializer() );
+	}
+
+	/**
+	 * Used by Hibernate Reactive
+	 */
+	protected EntityAssembler<?> buildEntityAssembler(EntityInitializer<?> entityInitializer) {
+		return new EntityAssembler<>( getFetchedMapping().getJavaType(), entityInitializer );
 	}
 
 	@Override