fix: _get_external_task_sensor

[claudiazi]

Issue:

The external sensor is poking the wrong external tag when checking the status of the external dag.

At the moment, we are using

from_pipeline_name = external_sensor_name.split("-")[0]
from_task_name = external_sensor_name.split("-")[1]

to define the from_pipeline_name and from_task_name to create the external sensor object.

However, there might be multiple - in the external_sensor_name. For example: core-salesforce-account_dimension_updater-sensor, with the current way, we will get the wrong from_pipeline_name and from_task_name which will create a sensor linked to a wrong/ non-existing external task.

Solution:

• Get the sensor related params directly from the graph and export it as a dictionary
• Use the params from this dictionary when creating the sensor instead of inferring from the sensor name

Test

Tested in: Airflow tst