Patroni bootstrap configuration for `pg_hba` and `pg_ident` is misplaced

In the configuration file generated for Patroni, we currently set values for pg_hba and pg_ident in the bootstrap section (as well as in the postgresql one), but this location is wrong. It should actually be bootstrap.dcs.postgresql.

This is not detected by Patroni's configuration validator because extra fields are allowed.

See !1560 (comment 2353946882)