Fold kubernetes-apps/network_plugin into network_plugin (#12506)

For what I can see, there is no reason for the split, and it makes
things confusing.

roles/network_plugin/kube-ovn/tasks/main.yml

@@ -15,3 +15,12 @@
     - {name: ovn, file: cni-ovn.yml}
     - {name: kube-ovn, file: cni-kube-ovn.yml}
   register: kube_ovn_node_manifests
+
+- name: Kube-OVN | Start Resources
+  kube:
+    name: "{{ item.item.name }}"
+    kubectl: "{{ bin_dir }}/kubectl"
+    filename: "{{ kube_config_dir }}/{{ item.item.file }}"
+    state: "latest"
+  with_items: "{{ kube_ovn_node_manifests.results }}"
+  when: inventory_hostname == groups['kube_control_plane'][0] and not item is skipped