[1.7.x] Fixed broken tests on Oracle after 5853c87a45.

Oracle doesn't have a `BEGIN` statement so the test would
fail.

Refs #23303

Backport of 54164b814c from master.

tests/user_commands/tests.py

@@ -1,6 +1,7 @@
 import os
 import sys
 
+from django.db import connection
 from django.core import management
 from django.core.management import CommandError
 from django.core.management.utils import find_command, popen_wrapper
@@ -77,7 +78,9 @@ class CommandTests(SimpleTestCase):
     def test_output_transaction(self):
         out = StringIO()
         management.call_command('transaction', stdout=out, no_color=True)
-        self.assertEqual(out.getvalue(), 'BEGIN;\nHello!\n\nCOMMIT;\n')
+        output = out.getvalue().strip()
+        self.assertTrue(output.startswith(connection.ops.start_transaction_sql()))
+        self.assertTrue(output.endswith(connection.ops.end_transaction_sql()))
 
 
 class UtilsTests(SimpleTestCase):