local_volume_provisioner: match upstream storage class syntax (#13504)

Use the upstream keys without converting them to snake case. This avoids
converting back to camel case when rendering, and aligns ourselves more
with our upstream.

roles/kubespray_defaults/vars/main/main.yml

@@ -69,10 +69,10 @@ kube_pods_subnets: >-
 local_volume_provisioner_storage_classes_default:
   - key: "{{ local_volume_provisioner_storage_class }}"
     value:
-      host_dir: "{{ local_volume_provisioner_base_dir }}"
-      mount_dir: "{{ local_volume_provisioner_mount_dir }}"
-      volume_mode: Filesystem
-      fs_type: ext4
+      hostDir: "{{ local_volume_provisioner_base_dir }}"
+      mountDir: "{{ local_volume_provisioner_mount_dir }}"
+      volumeMode: Filesystem
+      fsType: ext4
 
 ssl_ca_dirs_per_os_family:
   Debian: &usr_share