Stabilize adding future import via config option

[dylwil3]

Introduced in #19100. Removed gating, updated tests, removed warning(s), and updated documentation.

[github-actions]

ruff-ecosystem results

Linter (stable)

ℹ️ ecosystem check detected linter changes. (+2535 -0 violations, +0 -0 fixes in 2 projects; 53 projects unchanged)

apache/airflow (+2533 -0 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --ignore RUF9 --no-fix --output-format concise --no-preview --select ALL

+ airflow-core/src/airflow/api_fastapi/core_api/routes/public/connections.py:115:17: AIR311 `airflow.models.Connection` is removed in Airflow 3.0; It still works in Airflow 3.0 but is expected to be removed in a future version.
+ airflow-core/src/airflow/api_fastapi/core_api/routes/public/connections.py:125:26: AIR311 `airflow.models.Connection` is removed in Airflow 3.0; It still works in Airflow 3.0 but is expected to be removed in a future version.
+ airflow-core/src/airflow/api_fastapi/core_api/routes/public/connections.py:154:18: AIR311 `airflow.models.Connection` is removed in Airflow 3.0; It still works in Airflow 3.0 but is expected to be removed in a future version.
+ airflow-core/src/airflow/api_fastapi/core_api/routes/public/connections.py:193:17: AIR311 `airflow.models.Connection` is removed in Airflow 3.0; It still works in Airflow 3.0 but is expected to be removed in a future version.
+ airflow-core/src/airflow/api_fastapi/core_api/routes/public/connections.py:193:52: AIR311 `airflow.models.Connection` is removed in Airflow 3.0; It still works in Airflow 3.0 but is expected to be removed in a future version.
+ airflow-core/src/airflow/api_fastapi/core_api/routes/public/connections.py:232:16: AIR311 `airflow.models.Connection` is removed in Airflow 3.0; It still works in Airflow 3.0 but is expected to be removed in a future version.
+ airflow-core/src/airflow/api_fastapi/core_api/routes/public/connections.py:72:40: AIR311 `airflow.models.Connection` is removed in Airflow 3.0; It still works in Airflow 3.0 but is expected to be removed in a future version.
+ airflow-core/src/airflow/api_fastapi/core_api/routes/public/connections.py:92:40: AIR311 `airflow.models.Connection` is removed in Airflow 3.0; It still works in Airflow 3.0 but is expected to be removed in a future version.
+ airflow-core/src/airflow/api_fastapi/core_api/security.py:290:21: AIR311 `airflow.models.Connection` is removed in Airflow 3.0; It still works in Airflow 3.0 but is expected to be removed in a future version.
+ airflow-core/src/airflow/api_fastapi/core_api/security.py:358:21: AIR311 `airflow.models.Variable` is removed in Airflow 3.0; It still works in Airflow 3.0 but is expected to be removed in a future version.
... 2299 additional changes omitted for rule AIR311
+ airflow-core/tests/unit/api_fastapi/core_api/routes/public/test_xcom.py:406:15: AIR002 `DAG` or `@dag` should have an explicit `schedule` argument
+ airflow-core/tests/unit/dag_processing/test_collection.py:360:15: AIR002 `DAG` or `@dag` should have an explicit `schedule` argument
+ airflow-core/tests/unit/dag_processing/test_collection.py:450:15: AIR002 `DAG` or `@dag` should have an explicit `schedule` argument
+ airflow-core/tests/unit/dag_processing/test_collection.py:469:15: AIR002 `DAG` or `@dag` should have an explicit `schedule` argument
+ airflow-core/tests/unit/dag_processing/test_collection.py:487:15: AIR002 `DAG` or `@dag` should have an explicit `schedule` argument
+ airflow-core/tests/unit/dag_processing/test_collection.py:702:15: AIR002 `DAG` or `@dag` should have an explicit `schedule` argument
+ airflow-core/tests/unit/dag_processing/test_collection.py:745:15: AIR002 `DAG` or `@dag` should have an explicit `schedule` argument
+ airflow-core/tests/unit/dag_processing/test_processor.py:1006:14: AIR002 `DAG` or `@dag` should have an explicit `schedule` argument
+ airflow-core/tests/unit/dag_processing/test_processor.py:1054:14: AIR002 `DAG` or `@dag` should have an explicit `schedule` argument
+ airflow-core/tests/unit/dag_processing/test_processor.py:1097:14: AIR002 `DAG` or `@dag` should have an explicit `schedule` argument
... 195 additional changes omitted for rule AIR002
+ dev/airflow_perf/dags/perf_dag_1.py:41:10: AIR302 `airflow.operators.bash_operator.BashOperator` is moved into `standard` provider in Airflow 3.0;
+ dev/airflow_perf/dags/perf_dag_1.py:48:12: AIR302 `airflow.operators.bash_operator.BashOperator` is moved into `standard` provider in Airflow 3.0;
+ dev/airflow_perf/scheduler_dag_execution_timing.py:255:10: AIR301 `airflow.utils.db.create_session` is removed in Airflow 3.0
+ dev/airflow_perf/scheduler_dag_execution_timing.py:302:18: AIR301 `airflow.utils.db.create_session` is removed in Airflow 3.0
+ performance/src/performance_dags/performance_dag/performance_dag.py:100:13: AIR312 `airflow.operators.bash.BashOperator` is deprecated and moved into `standard` provider in Airflow 3.0; It still works in Airflow 3.0 but is expected to be removed in a future version.
+ performance/src/performance_dags/performance_dag/performance_dag.py:116:13: AIR312 `airflow.operators.python.PythonOperator` is deprecated and moved into `standard` provider in Airflow 3.0; It still works in Airflow 3.0 but is expected to be removed in a future version.
+ performance/src/performance_dags/performance_dag/performance_dag.py:249:9: AIR301 [*] `schedule_interval` is removed in Airflow 3.0
+ providers/alibaba/tests/unit/alibaba/cloud/log/test_oss_task_handler.py:189:67: AIR301 `filename_template` is removed in Airflow 3.0
+ providers/amazon/tests/unit/amazon/aws/log/test_cloudwatch_task_handler.py:421:13: AIR301 `filename_template` is removed in Airflow 3.0
+ providers/amazon/tests/unit/amazon/aws/log/test_s3_task_handler.py:349:70: AIR301 `filename_template` is removed in Airflow 3.0
+ providers/common/compat/src/airflow/providers/common/compat/lineage/hook.py:39:32: AIR301 [*] `airflow.lineage.hook.DatasetLineageInfo` is removed in Airflow 3.0
+ providers/common/compat/src/airflow/providers/common/compat/lineage/hook.py:39:5: AIR301 [*] `airflow.lineage.hook.DatasetLineageInfo` is removed in Airflow 3.0
+ providers/common/compat/src/airflow/providers/common/compat/lineage/hook.py:63:17: AIR301 [*] `airflow.lineage.hook.DatasetLineageInfo` is removed in Airflow 3.0
+ providers/common/compat/src/airflow/providers/common/compat/lineage/hook.py:67:17: AIR301 [*] `airflow.lineage.hook.DatasetLineageInfo` is removed in Airflow 3.0
... 8 additional changes omitted for rule AIR301
... 2499 additional changes omitted for project

pytest-dev/pytest (+2 -0 violations, +0 -0 fixes)

+ testing/code/test_code.py:91:15: B017 Do not assert blind exception: `Exception`
+ testing/example_scripts/fixtures/fill_fixtures/test_conftest_funcargs_only_available_in_subdir/sub2/conftest.py:9:5: B017 Do not assert blind exception: `Exception`

Changes by rule (6 rules affected)

code	total	+ violation	- violation	+ fix	- fix
AIR311	2308	2308	0	0	0
AIR002	204	204	0	0	0
AIR301	17	17	0	0	0
AIR302	2	2	0	0	0
AIR312	2	2	0	0	0
B017	2	2	0	0	0

Linter (preview)

✅ ecosystem check detected no linter changes.