The Raft topology workflow was changed by the limited voters feature: nodes no longer request votership themselves. As a result, the "stop_before_becoming_raft_voter" error injection is now obsolete and has been removed.
Fixes: scylladb/scylladb#23418
No backport: This re-enables a test, only needed for master.
Closesscylladb/scylladb#26042
* https://github.com/scylladb/scylladb:
group0: remove obsolete "stop_before_becoming_raft_voter" error injection
test/random_failures: preserve test repeatability when removing error injections