Add postgres.auth to allowed_states

Matches the elasticsearch.auth pattern where auth states use
the full sls path check and are explicitly listed.

salt/allowed_states.map.jinja

@@ -30,6 +30,7 @@
     'nginx',
     'influxdb',
     'postgres',
+    'postgres.auth',
     'soc',
     'kratos',
     'hydra',