Automatically generate node support functions in cloudberry

[chenjinbao1989]

When merging Postgres 16, automatic generation of node support
functions was not enabled. This commit enables the automatic
generation of write, read, copy, and equal functions.

In future code, developers will no longer need to manually create
NodeTags and their corresponding write/read/copy/equal functions
when creating or modifying structures.

[tuhaihe]

Hi, there is no Cloudberry, Inc. For the new files created by the Cloudberry community members, we should add the standard ASF license headers. Can take the following as a reference:

cloudberry/contrib/pax_storage/src/cpp/pax_gbench.cc

Lines 1 to 26 in 3a64dbc

	/*-------------------------------------------------------------------------
	*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing,
	* software distributed under the License is distributed on an
	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	* KIND, either express or implied. See the License for the
	* specific language governing permissions and limitations
	* under the License.
	*
	* pax_gbench.cc
	*
	* IDENTIFICATION
	* contrib/pax_storage/src/cpp/pax_gbench.cc
	*
	*-------------------------------------------------------------------------
	*/

[yjhjstz]

why remove T_DynamicIndexOnlyScanState ?