fix(meta): fix arguments_specs and assert.ymlOD

Author: adf-patrickha

meta/argument_specs.yml

@@ -67,5 +67,7 @@ argument_specs:
         description: "The master public key to use."
       bareos_fd_plugins:
         type: "list"
-        default: []
         description: "Bareos plugins to install on the FD"
+        elements: "str"
+        required: false
+        version_added: v1.1.0

tasks/assert.yml

@@ -98,10 +98,3 @@
     quiet: true
   when:
     - bareos_fd_encryption_enabled
-
-- name: assert | Test bareos_fd_plugins
-  ansible.builtin.assert:
-    that:
-      - bareos_fd_plugins is defined
-      - bareos_fd_plugins is iterable
-    quiet: true