Cleanup: remove all cloud_provider related tasks & files

Signed-off-by: ChengHao Yang <17496418+tico88612@users.noreply.github.com>

roles/kubernetes/kubeadm/defaults/main.yml

@@ -9,7 +9,7 @@ kubeadm_use_file_discovery: "{{ remove_anonymous_access }}"
 
 # If non-empty, will use this string as identification instead of the actual hostname
 kube_override_hostname: >-
-  {%- if cloud_provider is defined and cloud_provider in ['aws'] -%}
+  {%- if cloud_provider is defined -%}
   {%- else -%}
   {{ inventory_hostname }}
   {%- endif -%}