nixos/tests/vaultwarden: fix database creation

nixos/tests/vaultwarden.nix

@@ -54,9 +54,8 @@ let
             services.postgresql = {
               enable = true;
               initialScript = pkgs.writeText "postgresql-init.sql" ''
-                CREATE DATABASE bitwarden;
                 CREATE USER bitwardenuser WITH PASSWORD '${dbPassword}';
-                GRANT ALL PRIVILEGES ON DATABASE bitwarden TO bitwardenuser;
+                CREATE DATABASE bitwarden WITH OWNER bitwardenuser;
               '';
             };