MDEV-28135: Add missing conflict and breaks for MariaDB 10.6

There is missing conflict and breaks for MariaDB 10.6 which
can cause upgrading from 10.6 not be clean and end up with
errors on Debian.

debian/control

@@ -537,6 +537,7 @@ Conflicts: mariadb-server-core-10.0,
            mariadb-server-core-10.3,
            mariadb-server-core-10.4,
            mariadb-server-core-10.5,
+           mariadb-server-core-10.6,
            mariadb-server-core-5.1,
            mariadb-server-core-5.2,
            mariadb-server-core-5.3,
@@ -656,6 +657,7 @@ Conflicts: mariadb-server (<< ${source:Version}),
            mariadb-server-10.3,
            mariadb-server-10.4,
            mariadb-server-10.5,
+           mariadb-server-10.6,
            mariadb-server-5.1,
            mariadb-server-5.2,
            mariadb-server-5.3,
@@ -695,6 +697,7 @@ Replaces: handlersocket-mysql-5.5,
           mariadb-server-10.3,
           mariadb-server-10.4,
           mariadb-server-10.5,
+          mariadb-server-10.6,
           mariadb-server-5.1,
           mariadb-server-5.2,
           mariadb-server-5.3,