cherry-pick 6716 supplement Postgre procedure sql file (#6749)

Co-authored-by: NGaoTianDuo <gaotianduo_yewu@cmss.chinamobile.com>

sql/upgrade/2.0.0_schema/postgresql/dolphinscheduler_ddl_post.sql

@@ -15,3 +15,13 @@
  * limitations under the License.
 */
 
+ALTER TABLE "t_ds_process_definition" DROP CONSTRAINT "t_ds_process_definition_pkey";
+ALTER TABLE "t_ds_process_definition" ADD CONSTRAINT "t_ds_process_definition_pkey" PRIMARY KEY ("id","code");
+ALTER TABLE "t_ds_process_definition" DROP CONSTRAINT "process_definition_unique";
+DROP INDEX "process_definition_index";
+ALTER TABLE "t_ds_process_definition" DROP "process_definition_json";
+ALTER TABLE "t_ds_process_definition" DROP "connects";
+ALTER TABLE "t_ds_process_definition" DROP "receivers";
+ALTER TABLE "t_ds_process_definition" DROP "receivers_cc";
+ALTER TABLE "t_ds_process_definition" DROP "modify_by";
+ALTER TABLE "t_ds_process_definition" DROP "resource_ids";
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