message: test: Add race:SendZmqMessage tsan suppression
diff: # ThreadSanitizer suppressions
  # ============================
  +#
  +# https://github.com/google/sanitizers/wiki/ThreadSanitizerSuppressions
  # double locks (TODO fix)
  mutex:g_genesis_wait_mutex
  @@ -43,5 +45,14 @@ deadlock:src/qt/test/*
  deadlock:libdb
  race:libzmq
  +# Intermittent issues
  +# -------------------
  +#
  +# Suppressions that follow might only happen intermittently, thus they are not
  +# reproducible. Make sure to include a link to a full trace.
  +
  +# https://github.com/bitcoin/bitcoin/issues/20618
  +race:CZMQAbstractPublishNotifier::SendZmqMessage
  +
  # https://github.com/bitcoin/bitcoin/pull/20218, https://github.com/bitcoin/bitcoin/pull/20745
  race:epoll_ctl
  