**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.

tests/providers/amazon/aws/operators/test_ecs.py
"lastStatus": "PENDING",
            "taskArn": "arn:aws:ecs:us-east-1:012345678910:task/d8c67b3c-ac87-4ffe-a847-4785bc3a8b55",
            "taskDefinitionArn": "arn:aws:ecs:us-east-1:012345678910:task-definition/hello_world:11"
        }
    ]
}
class TestECSOperator(unittest.TestCase):
    @mock.patch('airflow.providers.amazon.aws.operators.ecs.AwsBaseHook')
    def set_up_operator(self, aws_hook_mock, **kwargs):
        self.aws_hook_mock = aws_hook_mock
        self.ecs_operator_args = {
            'task_id': 'task',
            'task_definition': 't',
            'cluster': 'c',
            'overrides': {},
            'aws_conn_id': None,
            'region_name': 'eu-west-1',
            'group': 'group',
            'placement_constraints': [
                {'expression': 'attribute:ecs.instance-type =~ t2.*', 'type': 'memberOf'}
            ],
            'placement_strategy': [{'field': 'memory', 'type': 'binpack'}],
            'network_configuration': {
                'awsvpcConfiguration': {'securityGroups': ['sg-123abc'], 'subnets': ['subnet-123456ab']}
            },
            'propagate_tags': 'TASK_DEFINITION',
        }
        self.ecs = ECSOperator(**self.ecs_operator_args, **kwargs)
        self.ecs.get_hook()
    def setUp(self):