[N1QL][RBAC] GRANT statement on a scope no longer works

in 7.6 we can no longer grant a role access to an entire scope

in previous versions this is what we would do, and it now errors in 7.6

GRANT query_select on default:default.test to johnDoe11
[
{
"code": 5220,
"msg": "Role query_select requires a keyspace.",
"reason":

,
"query": "GRANT query_select on default:default.test to johnDoe11"
}
]

quite a few rbac regression tests are now failing due to this