Skip leader slots until a vote lands (#15607) (#16147)

(cherry picked from commit b99ae8f334)

Co-authored-by: sakridge <sakridge@gmail.com>

core/src/test_validator.rs

@@ -422,6 +422,7 @@ impl TestValidator {
             warp_slot: config.warp_slot,
             bpf_jit: !config.no_bpf_jit,
             validator_exit: config.validator_exit.clone(),
+            no_wait_for_vote_to_start_leader: true,
             ..ValidatorConfig::default()
         };