feat: make kubernetes owner parametrized (#8952)

* feat: make kubernetes owner parametrized

* docs: update hardening guide with configuration for CIS 1.1.19

* fix: set etcd data directory permissions to be compliant to CIS 1.1.12

roles/adduser/defaults/main.yml

@@ -1,4 +1,5 @@
 ---
+kube_owner: kube
 kube_cert_group: kube-cert
 etcd_data_dir: "/var/lib/etcd"
 

roles/adduser/tasks/main.yml

@@ -13,3 +13,4 @@
     shell: "{{ user.shell|default(omit) }}"
     name: "{{ user.name }}"
     system: "{{ user.system|default(omit) }}"
+  when: kube_owner != "root"