Add project_id as a templated variable in two BQ operators

[leahecole]

Hi all! This is related to #23129. In BigQuery, fully qualified dataset names can be made using the GCP project ID even if the project ID isn't needed for the underlying API to work. It's not unusual to make project_id a default arg and to have it be templated, especially if you're using many BQ operators together. I've added it to two operators where I have used it to construct a dataset name.

I'm not 100% sure how we test templated fields - I looked at the BQ operator test and didn't see any kind of validation, and the test values we're passing to the mocked calls are not templated. Any recommendations for how to handle that are appreciated!

[eladkal]

I'm not 100% sure how we test templated fields - I looked at the BQ operator test and didn't see any kind of validation, and the test values we're passing to the mocked calls are not templated. Any recommendations for how to handle that are appreciated!

You can check this example:

airflow/tests/providers/google/cloud/operators/test_cloud_storage_transfer_service.py

Lines 717 to 734 in a3c9956

	def test_templates(self, _, create_task_instance_of_operator):
	dag_id = 'TestS3ToGoogleCloudStorageTransferOperator_test_templates'
	ti = create_task_instance_of_operator(
	CloudDataTransferServiceS3ToGCSOperator,
	dag_id=dag_id,
	s3_bucket='{{ dag.dag_id }}',
	gcs_bucket='{{ dag.dag_id }}',
	description='{{ dag.dag_id }}',
	object_conditions={'exclude_prefixes': ['{{ dag.dag_id }}']},
	gcp_conn_id='{{ dag.dag_id }}',
	task_id=TASK_ID,
	)
	ti.render_templates()
	assert dag_id == ti.task.s3_bucket
	assert dag_id == ti.task.gcs_bucket
	assert dag_id == ti.task.description
	assert dag_id == ti.task.object_conditions['exclude_prefixes'][0]
	assert dag_id == ti.task.gcp_conn_id

[eladkal]

@leahecole I'm fine with merging this without the test (most operators don't have it)

can you please fix the static tests?

[leahecole]

Yup - sorry, was OOO for a US holiday, I'll look into it in the next couple of days

[leahecole]

ah - you beat me to it, sorry for slowness! been focused on my intern. thank you @potiuk and @eladkal