TiKV 3.0 alert rules should be updated

[overvenus]

tidb-ansible/roles/prometheus/files/tikv.rules.yml

Lines 112 to 114 in 64a9c2f

	- alert: TiKV_raftstore_thread_cpu_seconds_total
	expr: sum(rate(tikv_thread_cpu_seconds_total{name=~"raftstore_.*"}[1m])) by (instance, name) > 0.8
	for: 1m

By default, it should be >1.6.

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tidb-ansible/roles/prometheus/files/tikv.rules.yml

Lines 160 to 161 in 64a9c2f

	- alert: TiKV_thread_apply_worker_cpu_seconds
	expr: sum(rate(tikv_thread_cpu_seconds_total{name="apply_worker"}[1m])) by (instance) > 0.9

By default it should be sum(rate(tikv_thread_cpu_seconds_total{name="apply.*"}[1m])) by (instance) > 1.8

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And TiKV_thread_storage_scheduler_cpu_seconds should be removed.