Docs: migrate to cloud_controllers

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

README.md

@@ -123,12 +123,9 @@ vagrant up
 - [Fedora CoreOS bootstrap](docs/operating_systems/fcos.md)
 - [openSUSE setup](docs/operating_systems/opensuse.md)
 - [Downloaded artifacts](docs/advanced/downloads.md)
-- [Cloud providers](docs/cloud_providers/cloud.md)
-- [OpenStack](docs/cloud_providers/openstack.md)
-- [AWS](docs/cloud_providers/aws.md)
-- [Azure](docs/cloud_providers/azure.md)
-- [vSphere](docs/cloud_providers/vsphere.md)
 - [Equinix Metal](docs/cloud_providers/equinix-metal.md)
+- [OpenStack](docs/cloud_controllers/openstack.md)
+- [vSphere](docs/cloud_controllerss/vsphere.md)
 - [Large deployments](docs/operations/large-deployments.md)
 - [Adding/replacing a node](docs/operations/nodes.md)
 - [Upgrades basics](docs/operations/upgrades.md)

contrib/terraform/openstack/README.md

@@ -620,7 +620,7 @@ Edit `inventory/$CLUSTER/group_vars/k8s_cluster/k8s_cluster.yml`:
 
 - Set variable **kube_network_plugin** to your desired networking plugin.
   - **flannel** works out-of-the-box
-  - **calico** requires [configuring OpenStack Neutron ports](/docs/cloud_providers/openstack.md) to allow service and pod subnets
+  - **calico** requires [configuring OpenStack Neutron ports](/docs/cloud_controllers/openstack.md) to allow service and pod subnets
 
 ```yml
 # Choose network plugin (calico, weave or flannel)

docs/_sidebar.md

@@ -15,13 +15,14 @@
   * [Ansible](/docs/ansible/ansible.md)
   * [Ansible Collection](/docs/ansible/ansible_collection.md)
   * [Vars](/docs/ansible/vars.md)
-* Cloud Providers (deprecated)
+* Cloud Controllers
+  * [Openstack](/docs/cloud_controllers/openstack.md)
+  * [Vsphere](/docs/cloud_controllers/vsphere.md)
+* Cloud Providers
   * [Aws](/docs/cloud_providers/aws.md)
   * [Azure](/docs/cloud_providers/azure.md)
   * [Cloud](/docs/cloud_providers/cloud.md)
   * [Equinix-metal](/docs/cloud_providers/equinix-metal.md)
-  * [Openstack](/docs/cloud_providers/openstack.md)
-  * [Vsphere](/docs/cloud_providers/vsphere.md)
 * CNI
   * [Calico](/docs/CNI/calico.md)
   * [Cilium](/docs/CNI/cilium.md)