[MariaDB packagers] MariaDB 11.1.2 and 11.2.1 release prep

Prep work for the MariaDB 11.1.2 and 11.2.1 releases has begun. Expected release date is Mon, 21 Aug 2023. Draft release notes and changelogs: MariaDB 11.1.2 - https://mariadb.com/kb/en/mdb-11-1-2-rn/ - https://mariadb.com/kb/en/mdb-11-1-2-cl/ MariaDB 11.2.1 - https://mariadb.com/kb/en/mdb-11-2-1-rn/ - https://mariadb.com/kb/en/mdb-11-2-1-cl/ As usual, the release notes and changelog are still in draft form at this time and will be updated prior to release. Thanks. -- Daniel Bartholomew, MariaDB Release Manager MariaDB | https://mariadb.com