[ci] remove Docker volumes during Azure cleanup

[StrikerRUS]

I believe we don't need preserving anonymous volumes during cleanup.

Refer to https://depot.dev/blog/docker-clear-cache#removing-everything-with-docker-system-prune and https://docs.docker.com/reference/cli/docker/system/prune/.

By default, volumes aren't removed to prevent important data from being deleted if there is currently no container using the volume. Use the --volumes flag when running the command to prune anonymous volumes as well:

[jameslamb]

I agree with you, the way we use this box, those volumes can all be safely removed. And that will free up a bit of disk space!

Thanks for thinking of this.

[StrikerRUS]

Thanks for thinking of this.

Thanks to this warning, I started looking into this 😄