Restart canal after scale or upgrade. Just like PR#4531, but for canal (#4992)

roles/network_plugin/canal/handlers/main.yml

@@ -0,0 +1,14 @@
+---
+- name: reset_canal_cni
+  command: /bin/true
+  notify:
+    - delete 10-canal.conflist
+    - delete canal-node containers
+
+- name: delete 10-canal.conflist
+  file:
+    path: /etc/canal/10-canal.conflist
+    state: absent
+
+- name: delete canal-node containers
+  shell: "docker ps -af name=k8s_POD_canal-node* -q | xargs --no-run-if-empty docker rm -f"

roles/network_plugin/canal/tasks/main.yml

@@ -4,6 +4,8 @@
     src: "cni-canal.conflist.j2"
     dest: "/etc/cni/net.d/{% if calico_version is version('v3.3.0', '>=') %}canal.conflist.template{% else %}10-canal.conflist{% endif %}"
     owner: kube
+  register: canal_conflist
+  notify: reset_canal_cni
 
 - name: Canal | Create canal certs directory
   file: