Deb: Make RocksDB plugin depend on python3 as myrocks_hotbackup needs it

This fixes the Lintian error and thus the Lintian override can also be
removed.

debian/control

@@ -644,6 +644,7 @@ Description: Amazon S3 archival storage engine for MariaDB
 Package: mariadb-plugin-rocksdb
 Architecture: amd64 arm64 mips64el ppc64el
 Depends: mariadb-server-10.5 (= ${binary:Version}),
+         python3,
          rocksdb-tools,
          ${misc:Depends},
          ${shlibs:Depends}

debian/mariadb-plugin-rocksdb.lintian-overrides

-# Overridden temporarily to get Salsa-CI pass and not stall other dev work with broken pipeline
-python-script-but-no-python-dep usr/bin/myrocks_hotbackup #!python