Cleanup: remove all cloud_provider related tasks & files

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

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

@@ -141,7 +141,7 @@ kube_proxy_nodeport_addresses: >-
 
 # 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 -%}