Fix ECS Executor compatibility with Airflow 3.x in `try_adopt_task_instances` (#62192)

* Fix ECS Executor compatibility with Airflow 3.x in try_adopt_task_instances

The try_adopt_task_instances method was calling ti.command_as_list() which
doesn't exist in Airflow 3.x due to Task SDK changes. This caused scheduler
to crash with AttributeError when trying to adopt orphaned ECS tasks.

* Fix ECS Executor compatibility with Airflow 3.x in try_adopt_task_instances

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Co-authored-by: iamapez <alexander@tradepost.co>