Cleanup: remove all cloud_provider related tasks & files

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

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

@@ -186,7 +186,7 @@ kube_encryption_resources: [secrets]
 
 # 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 -%}