fix Permission::Privilege path check

when checking a path, we only pushed the components to the checked value
that would contain a parameter and not fixed ones

e.g. from the path components (with params datastore="foo")
["datastore", "{datastore}"]

only ["foo"] was given to the lookup_privs function
instead of ["datastore", "foo"]

this fixes an issue where e.g. a prune on /datastore/foo would fail
for a user that has the role DatastorePowerUser on /datastore (with
propagate) or /datastore/foo

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

proxmox/src/api/permission.rs

@@ -142,6 +142,8 @@ fn check_api_permission_tail(
                             new_path.push(value);
                         }
                     }
+                } else {
+                    new_path.push(comp);
                 }
             }
             match userid {