branch-6.2 is already available, adding support for it in mergify to allow backport to this new branch. in addition, since branch 5.4 reached EOL - removing it Closes scylladb/scylladb#20669
branch-6.2 is already available, adding support for it in mergify to allow backport to this new branch. in addition, since branch 5.4 reached EOL - removing it Closes scylladb/scylladb#20669