`moto==4.2.5` causes ECS-related test failures

[chrisguidry]

Between moto==4.2.4 and 4.2.5, something changed which caused stoppedReason to be absent from response where we were expecting them:

https://github.com/getmoto/moto/compare/4.2.4...4.2.5

https://github.com/PrefectHQ/prefect-aws/actions/runs/6409809772

If I downgrade that one patch version, we're all good, but the release notes make me wonder if something that they changed is actually important for us:

https://github.com/getmoto/moto/compare/4.2.4...4.2.5#diff-20df862dcc461d786fada45f544b5e56def9739a8e63de45106bb0e515d06840R137-R149

[jakekaplan]

I think you were right about the change. I think we were essentially relying on the state not changing and staying in RUNNING? But if I'm understanding the change right, now every time you call describe_tasks it will advance the state?

moto==4.2.4

{
    "attachments":
    [],
    "clusterArn": "arn:aws:ecs:us-east-1:123456789012:cluster/default",
    "containerInstanceArn": "arn:aws:ecs:us-east-1:123456789012:container-instance/default/bd383890-d174-4b59-bcc4-c177605e8ac8",
    "containers":
    [
        {
            "name": "prefect",
            "exitCode": 0
        }
    ],
    "desiredStatus": "RUNNING",
    "lastStatus": "RUNNING",
    "launchType": "EC2",
    "overrides":
    {
        "containerOverrides":
        [
            {
                "name": "prefect",
                "environment":
                []
            }
        ]
    },
    "startedBy": "",
    "stoppedReason": "",
    "tags":
    [],
    "taskArn": "arn:aws:ecs:us-east-1:123456789012:task/default/344082a2-67c8-479e-a181-a79f98011c01",
    "taskDefinitionArn": "arn:aws:ecs:us-east-1:123456789012:task-definition/prefect:1"
}

moto==4.2.5

{
    "attachments":
    [],
    "clusterArn": "arn:aws:ecs:us-east-1:123456789012:cluster/default",
    "containerInstanceArn": "arn:aws:ecs:us-east-1:123456789012:container-instance/default/63ece0f4-9113-4ef7-892d-620938d4a1e4",
    "containers":
    [
        {
            "name": "prefect",
            "exitCode": 0
        }
    ],
    "desiredStatus": "RUNNING",
    "lastStatus": "STOPPED",
    "launchType": "EC2",
    "overrides":
    {
        "containerOverrides":
        [
            {
                "name": "prefect",
                "environment":
                []
            }
        ]
    },
    "startedBy": "",
    "stoppedReason": "",
    "tags":
    [],
    "taskArn": "arn:aws:ecs:us-east-1:123456789012:task/default/b933b895-4949-47a1-8afe-a408e36406f3",
    "taskDefinitionArn": "arn:aws:ecs:us-east-1:123456789012:task-definition/prefect:1"
}