Cleanup: remove all cloud_provider related tasks & files

inventory/sample/group_vars/k8s_cluster/k8s-cluster.yml

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

...tes-apps/cloud_controller/oci/tasks/credentials-check.yml

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

...controller/oci/templates/controller-manager-config.yml.j2

.../cloud_controller/oci/templates/oci-cloud-provider.yml.j2

roles/kubernetes-apps/cluster_roles/files/oci-rbac.yml

roles/kubernetes-apps/cluster_roles/tasks/main.yml

roles/kubernetes-apps/cluster_roles/tasks/oci.yml

roles/kubernetes-apps/meta/main.yml

roles/kubernetes-apps/persistent_volumes/meta/main.yml

...netes-apps/persistent_volumes/openstack/defaults/main.yml

...bernetes-apps/persistent_volumes/openstack/tasks/main.yml

...olumes/openstack/templates/openstack-storage-class.yml.j2

roles/kubernetes/control-plane/defaults/main/main.yml

...es/control-plane/templates/kubeadm-config.v1beta3.yaml.j2

roles/kubernetes/kubeadm/defaults/main.yml

roles/kubernetes/node/defaults/main.yml

...s/node/tasks/cloud-credentials/azure-credential-check.yml

...de/tasks/cloud-credentials/openstack-credential-check.yml