migrations: add missing migration in test suite

tests/test_app/migrations/0002_alter_testmodel_related_and_more.py

@@ -0,0 +1,23 @@
+# Generated by Django 5.0.1 on 2024-01-30 19:07
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('test_app', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='testmodel',
+            name='related',
+            field=models.ManyToManyField(blank=True, related_name='+', to='test_app.testmodelrelated'),
+        ),
+        migrations.AlterField(
+            model_name='testmodel',
+            name='related_through',
+            field=models.ManyToManyField(blank=True, related_name='+', through='test_app.TestModelThrough', to='test_app.testmodelrelated'),
+        ),
+    ]