[tests] Make setup_docker clean up better (#71949)

Change:
- pip packages should get removed after, not try to add them again
- Try removing containerd.io package too

Test Plan:
- CI

Signed-off-by: Rick Elrod <rick@elrod.me>

test/integration/targets/incidental_inventory_docker_swarm/playbooks/swarm_cleanup.yml

@@ -15,4 +15,5 @@
           - docker
           - docker-ce
           - docker-ce-cli
+          - containerd.io
         state: absent

test/integration/targets/incidental_setup_docker/defaults/main.yml

@@ -7,6 +7,7 @@ docker_packages:
   - docker-ce
 
 docker_pip_extra_packages: []
+docker_pip_never_remove: []
 docker_pip_packages:
   - docker
 
@@ -14,3 +15,4 @@ docker_cleanup_packages:
   - docker
   - docker-ce
   - docker-ce-cli
+  - containerd.io

test/integration/targets/incidental_setup_docker/handlers/main.yml

@@ -1,11 +1,11 @@
 - name: remove pip packages
   pip:
-    state: present
+    state: absent
-    name: "{{ docker_pip_packages | union(docker_pip_extra_packages) }}"
+    name: "{{ docker_pip_packages | union(docker_pip_extra_packages) | difference(docker_pip_never_remove) }}"
   listen: cleanup docker
   when: not docker_skip_cleanup | bool
 
-- name: remove docker pagkages
+- name: remove docker packages
   action: "{{ ansible_facts.pkg_mgr }}"
   args:
     name: "{{ docker_cleanup_packages }}"

test/integration/targets/incidental_setup_docker/vars/RedHat-7.yml

@@ -10,3 +10,9 @@ docker_packages:
 
 docker_pip_extra_packages:
   - requests==2.6.0
+
+# We need to pin the above so pip finds the right system-installed package
+# but we never want to try to remove it, so we substract this from the set of
+# packages we remove on cleanup
+docker_pip_never_remove:
+  - requests==2.6.0