fix: provide an option to ignore sysctl errors about unknown keys (#12514)

* fix: provide an option to ignore sysctl errors about unknown keys

* fix: rename sysctl_ignoreerrors and remove useless var definitions

roles/kubernetes/node/tasks/main.yml

@@ -50,6 +50,7 @@
     sysctl_file: "{{ sysctl_file_path }}"
     state: present
     reload: true
+    ignoreerrors: "{{ sysctl_ignore_unknown_keys }}"
   when: kube_apiserver_node_port_range is defined
   tags:
     - kube-proxy
@@ -100,6 +101,7 @@
     sysctl_file: "{{ sysctl_file_path }}"
     value: "1"
     reload: true
+    ignoreerrors: "{{ sysctl_ignore_unknown_keys }}"
   when: sysctl_bridge_nf_call_iptables.rc == 0
   with_items:
     - net.bridge.bridge-nf-call-iptables