Describe the issue: In OCS/ODF doc[1],[2] we mention that csi-provisioner pods should be scheduled on storage nodes

Table 2.1. Pods corresponding to OpenShift Container storage cluster, Section CSI:

~~~
* csi-cephfsplugin-provisioner-* (2 pods distributed across storage nodes)

[...]

* csi-rbdplugin-provisioner-* (2 pods distributed across storage nodes)
~~~

This is not accurate: the CSI provisioner pods can be placed on any worker node (storage or "pure" worker): the Deployment do not define any nodeSelector.

[1] https://access.redhat.com/documentation/en-us/red_hat_openshift_container_storage/4.7/html/deploying_and_managing_openshift_container_storage_using_red_hat_openstack_platform/deploying-openshift-container-storage-on-red-hat-openstack-platform_internal-osp#verifying-the-state-of-the-pods_internal-osp
[2] https://access.redhat.com/documentation/en-us/red_hat_openshift_container_storage/4.8/html/deploying_and_managing_openshift_container_storage_using_red_hat_openstack_platform/deploying-openshift-container-storage-on-red-hat-openstack-platform_internal-osp#verifying-the-state-of-the-pods_internal-osp