Less precise check for error message in trigger initialization (#32035)

The test for error message (introduced in #31999) in trigger
initialization expected precise error message, however Python 3.10
changed the details printed when TypeError was converted to string
(including the information about class being created not only method).
This caused the tests to fail on Python 3.10 and 3.11.

Making two asserts with two parts of the message expected solves
the problem for all python versions.

tests/jobs/test_triggerer_job.py

@@ -300,10 +300,8 @@ def test_update_trigger_with_triggerer_argument_change(
 
         trigger_runner.update_triggers({1})
 
-        assert (
-            "Trigger failed; message=__init__() got an unexpected keyword argument 'not_exists_arg'"
-            in caplog.text
-        )
+        assert "Trigger failed" in caplog.text
+        assert "got an unexpected keyword argument 'not_exists_arg'" in caplog.text
 
 
 def test_trigger_create_race_condition_18392(session, tmp_path):