The workflow of becoming a voter changes with the "limited voters"
feature, as the node will no longer become a voter on its own, but the
votership is being managed by the topology coordinator. This therefore
breaks the `stop_before_becoming_raft_voter` test, as that injection
relies on the old behavior.
We will disable the test for this particular case for now and address
either fixing of complete removal of the test in a follow-up task.
Refs: scylladb/scylladb#23418
00794af94d