Port `TestFileTaskLogHandler` tests to new Structlog logs

[kaxil]

Body

Fix the following

airflow/airflow-core/tests/unit/utils/test_log_handlers.py

Lines 108 to 109 in 7c2c886

	@pytest.mark.xfail(reason="TODO: Needs to be ported over to the new structlog based logging")
	def test_file_task_handler_when_ti_value_is_invalid(self, dag_maker):

airflow/airflow-core/tests/unit/utils/test_log_handlers.py

Lines 153 to 154 in 7c2c886

	@pytest.mark.xfail(reason="TODO: Needs to be ported over to the new structlog based logging")
	def test_file_task_handler(self, dag_maker, session):

Committer

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