fix #2978: allow non-root to view datastore usage

for datastores where the requesting user has read or write permissions,
since the API method itself filters by that already. this is the same
permission setting and filtering that the datastore list API endpoint
does.

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

src/api2/status.rs

@@ -74,6 +74,9 @@ use crate::config::acl::{
             },
         },
     },
+    access: {
+        permission: &Permission::Anybody,
+    },
 )]
 /// List Datastore usages and estimates
 fn datastore_status(