[Buildroot] Docker Compose v2 released

[Christian Stewart]

Hi all,

Docker Compose v2 was released. It's a rewrite in Go (from Python).

https://github.com/docker/compose

The changes for Buildroot will need to be (for backwards compat):

 - docker-compose: switch to go package
 - docker-compose: depend on docker-cli
 - install docker-compose binary to /usr/libexec/docker/cli-plugins
 - install https://github.com/docker/compose-switch to /usr/bin/docker-compose

The new command is "docker compose" with a CLI plugin, and
compose-switch fills in for the old "docker-compose" binary.

I'll have a look at making these changes soon.

Thanks,
Christian Stewart