cli: deprecation notice

[ndeloof]

https://docker.atlassian.net/browse/ENV-189

What I did
added a deprecation notice when compose-cli is used with a non-default context type

$ docker context create ecs toto
Cloud integration is DEPRECATED. Read more on https://docs.docker.com/cloud/ecs-integration/
? Create a Docker context using:  [Use arrows to move, type to filter]
..

(not mandatory) A picture of a cute animal, if possible in relation with what you did

[glours]

LGTM 👍

[aevesdocker]

Could we also add to this PR the banner for docs? We pull in some of the pages (shown in the screenshot) into the docs repo but the banner needs to be added here.

Can we add:

>**Important**
>
>Docker Compose's integration for ECS and ACI is retiring in November 2023.
{: .important}

This will then render as an Important callout in the docs