Manage new createrole_self_grant setting (PG16)

[cyrilgdn]

cf #407 (comment)
PR: #481

In v1.24.0, we did a small fix to be compatible with PG16 but with the same behavior than previous version. In Postgres 16, we can now change the role inheritance behavior when a non-superuser role creates another role.
cf https://www.postgresql.org/docs/current/runtime-config-client.html#GUC-CREATEROLE-SELF-GRANT

The new setting createrole_self_grant allows to configure this behavior
@librucha already did the work in #481 to manage this setting, I'm just creating this issue to keep track of it until we merge/release it.

[librucha]

@cyrilgdn I closed previous PR #481 and will prepeare smaller PR only for role parameters attribute. (currently only with createrole_self_grant allowed).