Fixes #7030 -- Fix new migrations not extending from abstract class that overrides transactionality.

config/events.php

@@ -35,6 +35,7 @@ return static function (CallableEventDispatcherInterface $dispatcher) {
                     'table_name' => 'app_migrations',
                     'version_column_length' => 191,
                 ],
+                'custom_template' => $environment->getBaseDirectory() . '/util/doctrine_migration.php.tmpl',
             ];
 
             $buildMigrationConfigurationsEvent = new Event\BuildMigrationConfigurationArray(

src/Entity/Migration/Version20240319113446.php

@@ -5,7 +5,6 @@ declare(strict_types=1);
 namespace App\Entity\Migration;
 
 use Doctrine\DBAL\Schema\Schema;
-use Doctrine\Migrations\AbstractMigration;
 
 final class Version20240319113446 extends AbstractMigration
 {

src/Entity/Migration/Version20240319115513.php

@@ -5,7 +5,6 @@ declare(strict_types=1);
 namespace App\Entity\Migration;
 
 use Doctrine\DBAL\Schema\Schema;
-use Doctrine\Migrations\AbstractMigration;
 
 final class Version20240319115513 extends AbstractMigration
 {

util/doctrine_migration.php.tmpl

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace <namespace>;
+
+use Doctrine\DBAL\Schema\Schema;
+use App\Entity\Migrations\AbstractMigration;
+
+final class <className> extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        <up>
+    }
+
+    public function down(Schema $schema): void
+    {
+        <down>
+    }
+    <override>
+}