**Description**

Currently when `ECSOperator` is run, the logs of the ECS task are fetched only when the task is done. That's not so convenient, especially when the task takes some good amount of time. In order to understand what's happening with the task, I need to go to Cloudwatch and search for the tasks logs. It would be good to have some parallel process that could fetch ECS task logs from Cloudwatch and make them visible in a realtime. 

**Are you willing to submit a PR?**

I can try, but I need to be guided.

airflow/providers/amazon/aws/operators/ecs.py
"""
    A structured Protocol for ``boto3.client('ecs')``. This is used for type hints on
    :py:meth:`.ECSOperator.client`.
    .. seealso::
        - https://mypy.readthedocs.io/en/latest/protocols.html
        - https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ecs.html
    """
    def run_task(self, **kwargs) -> Dict:
        """https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ecs.html#ECS.Client.run_task"""  
        ...
    def get_waiter(self, x: str) -> Waiter:
        """https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ecs.html#ECS.Client.get_waiter"""  
        ...
    def describe_tasks(self, cluster: str, tasks) -> Dict:
        """https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ecs.html#ECS.Client.describe_tasks"""  
        ...
    def stop_task(self, cluster, task, reason: str) -> Dict:
        """https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ecs.html#ECS.Client.stop_task"""  
        ...
    def describe_task_definition(self, taskDefinition: str) -> Dict:
        """https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ecs.html#ECS.Client.describe_task_definition"""  
        ...
    def list_tasks(self, cluster: str, launchType: str, desiredStatus: str, family: str) -> Dict:
        """https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ecs.html#ECS.Client.list_tasks"""  
        ...
class ECSOperator(BaseOperator):