[1.8.x] Refs #25896 -- Fixed migration test failure on Oracle

The test creates and deletes a model in the same migration, and the model
had an AutoField. On Oracle, AutoField's are set up using deferred SQL, which
in this case was trying to modify a table after it had dbeen removed.

Backport of c8b3fbe from master

tests/migrations/test_operations.py

@@ -1852,7 +1852,10 @@ class OperationTests(OperationTestBase):
             ),
             migrations.CreateModel(
                 "ILoveMorePonies",
-                [("id", models.AutoField(primary_key=True))],
+                # We use IntegerField and not AutoField because
+                # the model is going to be deleted immediately
+                # and with an AutoField this fails on Oracle
+                [("id", models.IntegerField(primary_key=True))],
                 options={"db_table": "ilovemoreponies"},
             ),
             migrations.DeleteModel("ILoveMorePonies"),