Openstack cloud provider configuration after version >= v1.26 should include CSI, cloud-provider-controller setups

[changexd]

Bumping into multiple issues creating a v1.26.x cluster using RKE templates with openstack, I've found out the configuration section of openstack is outdated, error unknown cloud provider "openstack" will come from kubelet if one follows the openstack setup from the ofiicial documentation.

After deleting cloudprovider section from the RKE template, the cluster can then be created, follow by installations of openstack CSI driver and cloud controller manager and setting up accordingly, the cluster can work normally.

related reference:
https://kubernetes.io/blog/2022/12/09/kubernetes-v1-26-release/#in-tree-openstack-cinder-driver-removal
kubernetes/enhancements#1489