There are still some differences in due to systemd and service triggers,
but these differences make sense and are likely to be synced the other
way later so that downstream Debian official packaging adopts them.

The synced changes include among others:
- https://salsa.debian.org/mariadb-team/mariadb-10.4/-/commit/9f49e4b494f3dad8c403972996f7a1ebceb4b34f
- https://salsa.debian.org/mariadb-team/mariadb-10.4/-/commit/6440c0d6e75aeda134f4f942eee4fbfd62b1ce20
- https://salsa.debian.org/mariadb-team/mariadb-10.4/-/commit/6e5ee72d647744bf84c42e02c3dfe888912e739e
- https://salsa.debian.org/mariadb-team/mariadb-10.4/-/commit/e62e67ae4b7679c43e80a20ab3ba3c51f01f0714
- https://salsa.debian.org/mariadb-team/mariadb-10.4/-/commit/df2415a53d5604755768f00aad0c640df1ad815c
- https://salsa.debian.org/mariadb-team/mariadb-10.4/-/commit/643558da74990f8648b3c86039e253dbae337c84