Add tests to native_tenant_data_isolation_basic_security_token.js to test the following agg stages work correctly when sent with a security token.

The following agg stages take either a nss or db name as an input field:

• $graphLookup
• $lookup
• $merge
• $out
• $unionWith

The above should all correctly construct NamespaceString/DatabaseName objects with a tenantId already.

The following agg stages include a nss or db name as output:

• $collStats
  • We'll need to change the serialization points here and here to call NamespaceStringUtil::serialize.