Support multiple local volume provisioner StorageClasses (#3450)

- Local Volume StorageClass configuration is now manged by `local_volume_provisioner_storage_classes`, a list of maps that specifies local storage classes with `name` `host_dir` and `mount_dir` keys per entry
- Tasks and templates updated to loop through local volume storage classes
- Previous defaults for path/class names were not changed
- Fixed an issue where a `kubernetes/preinstall` was creating directories inconsistently with the `kubernetes-apps/external_provisioner/local_volume_provisioner` task

roles/kubernetes/preinstall/tasks/0050-create_directories.yml

@@ -46,12 +46,12 @@
 
 - name: Create local volume provisioner directories
   file:
-    path: "{{ item }}"
+    path: "{{ item.host_dir }}"
     state: directory
-    owner: kube
-  with_items:
-    - "{{ local_volume_provisioner_base_dir }}"
-    - "{{ local_volume_provisioner_mount_dir }}"
+    owner: root
+    group: root
+    mode: 0700
+  with_items: "{{ local_volume_provisioner_storage_classes }}"
   when:
     - inventory_hostname in groups['k8s-cluster']
     - local_volume_provisioner_enabled