Consider nemeses used in PingCAP

[ligurio]

https://github.com/pingcap/tipocket#nemesis

• random_kill, all_kill, minor_kill, major_kill, kill_tikv_1node_5min, kill_pd_leader_5min: As their name implies, these nemeses inject unavailable in a specified period of time.
• short_kill_tikv_1node, short_kill_pd_leader: Kill selected container, used to inject short duration of unavailable fault.
  partition_one: Isolate single nodes
• scaling: Scale up/down TiDB/PD/TiKV nodes randomly
• shuffle-leader-scheduler/shuffle-region-scheduler/random-merge-scheduler: Just as there name implies.
• delay_tikv, delay_pd, errno_tikv, errno_pd, mixed_tikv, mixed_pd: Inject IO-related fault.
• small_skews, subcritical_skews, critical_skews, big_skews, huge_skews: Clock skew, small_skews ~100ms, subcritical_skews ~200ms, critical_skews ~250ms, big_skews ~500ms and huge_skews ~5s.