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-router/tasks/main.yml

@@ -60,3 +60,25 @@
     mode: "0644"
   delegate_to: "{{ groups['kube_control_plane'] | first }}"
   run_once: true
+
+- name: Kube-router | Start Resources
+  kube:
+    name: "kube-router"
+    kubectl: "{{ bin_dir }}/kubectl"
+    filename: "{{ kube_config_dir }}/kube-router.yml"
+    resource: "ds"
+    namespace: "kube-system"
+    state: "latest"
+  delegate_to: "{{ groups['kube_control_plane'] | first }}"
+  run_once: true
+
+- name: Kube-router | Wait for kube-router pods to be ready
+  command: "{{ kubectl }} -n kube-system get pods -l k8s-app=kube-router -o jsonpath='{.items[?(@.status.containerStatuses[0].ready==false)].metadata.name}'"   # noqa ignore-errors
+  register: pods_not_ready
+  until: pods_not_ready.stdout.find("kube-router")==-1
+  retries: 30
+  delay: 10
+  ignore_errors: true
+  delegate_to: "{{ groups['kube_control_plane'] | first }}"
+  run_once: true
+  changed_when: false