Deduplicate kubeadm_patches tasks

kubernetes/control-plane and kubernetes/kubeadm roles both push kubeadm
patches in the same way.
Extract that code and make it a dependency of both.
This is safe because it's only configuration for kubeadm, which only
takes effect when kubeadm is run.

roles/kubernetes/kubeadm/meta/main.yml

@@ -0,0 +1,3 @@
+---
+dependencies:
+  - role: kubernetes/kubeadm_common

roles/kubernetes/kubeadm/tasks/main.yml

@@ -83,21 +83,6 @@
     mode: "0640"
   when: ('kube_control_plane' not in group_names)
 
-- name: Kubeadm | Create directory to store kubeadm patches
-  file:
-    path: "{{ kubeadm_patches.dest_dir }}"
-    state: directory
-    mode: "0640"
-  when: kubeadm_patches is defined and kubeadm_patches.enabled
-
-- name: Kubeadm | Copy kubeadm patches from inventory files
-  copy:
-    src: "{{ kubeadm_patches.source_dir }}/"
-    dest: "{{ kubeadm_patches.dest_dir }}"
-    owner: "root"
-    mode: "0644"
-  when: kubeadm_patches is defined and kubeadm_patches.enabled
-
 - name: Join to cluster if needed
   environment:
     PATH: "{{ bin_dir }}:{{ ansible_env.PATH }}:/sbin"