rpm: docker-ce-cli: add docker-compose-plugin as "required"

Unfortunately (unlike deb packages), rpm packages do not have "soft" dependencies,
so to define a relation between the docker cli and the compose-plugin, we must
use "requires".

Alternatively, we can omit the dependency, to make the plugin an "optional" install,
and handle this through documentation, and in the script at download.docker.com.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah

rpm/SPECS/docker-ce-cli.spec

@@ -16,6 +16,7 @@ Packager: Docker <support@docker.com>
 # required packages on install
 Requires: /bin/sh
 Requires: /usr/sbin/groupadd
+Requires: docker-compose-plugin
 # TODO change once we support scan-plugin on other architectures
 %ifarch x86_64
 Requires: docker-scan-plugin(x86-64)