fix: keep included k3s coredns (#1197)

* Delete bootstrap/templates/kubernetes/apps/kube-system/coredns directory

* Update kustomization.yaml.j2

* Delete bootstrap/templates/ansible/playbooks/templates/custom-coredns-helmchart.yaml.j2.j2

* Update cluster-installation.yaml.j2

* Delete bootstrap/templates/ansible/playbooks/tasks/coredns.yaml.j2

* Update main.yaml.j2

* Update main.yaml.j2

* Update main.yaml.j2

* Update main.yaml.j2

* Update cluster-installation.yaml.j2

bootstrap/templates/ansible/inventory/group_vars/worker/main.yaml.j2

@@ -2,7 +2,6 @@
 ---
 # https://rancher.com/docs/k3s/latest/en/installation/install-options/agent-config/
 # https://github.com/PyratLabs/ansible-role-k3s
-
 k3s_control_node: false
 k3s_agent:
   #% if bootstrap_ipv6_enabled | default(false) %#
@@ -11,7 +10,6 @@ k3s_agent:
   node-ip: "{{ ansible_host }}"
   #% endif %#
   pause-image: registry.k8s.io/pause:3.9
-  # TODO: Move these options to a kubelet config file
   kubelet-arg:
     - "image-gc-high-threshold=55"
     - "image-gc-low-threshold=50"