Change parsing of docker info in dev build

This is a non-functional change. The way os_info is populated with docker info
and grep 'Operating System' breaks on podman and likely in other places. This
makes it work on both podman and docker, and it will continue to return the
exact same strings everywhere else.

tools/docker-compose/ansible/roles/sources/tasks/main.yml

@@ -67,7 +67,7 @@
 
 - name: Get OS info for sdb
   shell: |
-    docker info | grep 'Operating System'
+    docker info 2> /dev/null | awk '/Os:/ { gsub(/Os:/, "Operating System:"); }/Operating System/ { print; }'
   register: os_info
   changed_when: false