[WIP] Make DagRun and Dag pylint-compatible

[potiuk]

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[turbaszek]

I'm afraid that this will require more changes due to cyclic imports :<

[potiuk]

I want to rebase that one on top of #10499 to see if the cyclic dependencies problem will be fixed,

[potiuk]

This is the last one @BasPH ...... https://lists.apache.org/thread.html/f4940d36e98ded96a2473bb2ccdfa4cc648faa2c1334b2aa901c0bba%40%3Cdev.airflow.apache.org%3E

[potiuk]

It will likely fail with cyclic impots we will have to resolve though :(

[potiuk]

airflow/providers/amazon/aws/example_dags/example_emr_job_flow_automatic_steps.py:1:0: R0401: Cyclic import (airflow.models.dag -> airflow.operators.subdag_operator) (cyclic-import)
airflow/providers/amazon/aws/example_dags/example_emr_job_flow_automatic_steps.py:1:0: R0401: Cyclic import (airflow.models -> airflow.models.dag -> airflow.sensors.external_task_sensor) (cyclic-import)
airflow/providers/amazon/aws/example_dags/example_emr_job_flow_automatic_steps.py:1:0: R0401: Cyclic import (airflow.models -> airflow.models.dagbag -> airflow.models.dag -> airflow.sensors.external_task_sensor -> airflow.operators.dummy_operator) (cyclic-import)
airflow/providers/amazon/aws/example_dags/example_emr_job_flow_automatic_steps.py:1:0: R0401: Cyclic import (airflow.api.common.experimental.get_task_instance -> airflow.models -> airflow.models.dag -> airflow.operators.subdag_operator) (cyclic-import)
airflow/providers/amazon/aws/example_dags/example_emr_job_flow_automatic_steps.py:1:0: R0401: Cyclic import (airflow.models -> airflow.models.dagbag -> airflow.models.serialized_dag -> airflow.serialization.serialized_objects -> airflow.models.dag -> airflow.sensors.external_task_sensor -> airflow.operators.dummy_operator) (cyclic-import)
airflow/providers/amazon/aws/example_dags/example_emr_job_flow_automatic_steps.py:1:0: R0401: Cyclic import (airflow.models -> airflow.models.dagbag -> airflow.models.serialized_dag -> airflow.models.dag -> airflow.sensors.external_task_sensor -> airflow.operators.dummy_operator) (cyclic-import)
airflow/providers/amazon/aws/example_dags/example_emr_job_flow_automatic_steps.py:1:0: R0401: Cyclic import (airflow.api.common.experimental -> airflow.models -> airflow.models.dag -> airflow.operators.subdag_operator -> airflow.api.common.experimental.get_task_instance) (cyclic-import)

[potiuk]

Tomorrow :)

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