Replace kube-master with kube_control_plane (#7256)

This replaces kube-master with kube_control_plane because of [1]:

  The Kubernetes project is moving away from wording that is
  considered offensive. A new working group WG Naming was created
  to track this work, and the word "master" was declared as offensive.
  A proposal was formalized for replacing the word "master" with
  "control plane". This means it should be removed from source code,
  documentation, and user-facing configuration from Kubernetes and
  its sub-projects.

NOTE: The reason why this changes it to kube_control_plane not
      kube-control-plane is for valid group names on ansible.

[1]: https://github.com/kubernetes/enhancements/blob/master/keps/sig-cluster-lifecycle/kubeadm/2067-rename-master-label-taint/README.md#motivation

roles/kubernetes-apps/cloud_controller/oci/tasks/main.yml

@@ -7,7 +7,7 @@
   template:
     src: controller-manager-config.yml.j2
     dest: "{{ kube_config_dir }}/controller-manager-config.yml"
-  when: inventory_hostname == groups['kube-master'][0]
+  when: inventory_hostname == groups['kube_control_plane'][0]
   tags: oci
 
 - name: "OCI Cloud Controller | Slurp Configuration"
@@ -18,14 +18,14 @@
 - name: "OCI Cloud Controller | Encode Configuration"
   set_fact:
     controller_manager_config_base64: "{{ controller_manager_config.content }}"
-  when: inventory_hostname == groups['kube-master'][0]
+  when: inventory_hostname == groups['kube_control_plane'][0]
   tags: oci
 
 - name: "OCI Cloud Controller | Generate Manifests"
   template:
     src: oci-cloud-provider.yml.j2
     dest: "{{ kube_config_dir }}/oci-cloud-provider.yml"
-  when: inventory_hostname == groups['kube-master'][0]
+  when: inventory_hostname == groups['kube_control_plane'][0]
   tags: oci
 
 - name: "OCI Cloud Controller | Apply Manifests"
@@ -33,5 +33,5 @@
     kubectl: "{{ bin_dir }}/kubectl"
     filename: "{{ kube_config_dir }}/oci-cloud-provider.yml"
     state: latest
-  when: inventory_hostname == groups['kube-master'][0]
+  when: inventory_hostname == groups['kube_control_plane'][0]
   tags: oci