Replace hardcoded list in RedHat with docker_obsolete_packages

tasks/setup-RedHat.yml

@@ -1,10 +1,7 @@
 ---
 - name: Ensure old versions of Docker are not installed.
   package:
-    name:
-      - docker
-      - docker-common
-      - docker-engine
+    name: "{{ docker_obsolete_packages }}"
     state: absent
 
 - name: Add Docker GPG key.

vars/Fedora.yml

@@ -0,0 +1,15 @@
+---
+docker_install_compose_plugin: false
+docker_obsolete_packages:
+  - docker
+  - docker.io
+  - docker-engine
+  - podman-docker
+  - containerd
+  - runc
+  # - docker
+  # - docker-compose
+  # - docker-compose-plugin
+  # - docker-ce
+  # - docker-ce-cli
+  # - docker-ce-rootless-extras