Merge pull request #972 from drmingdrmer/release-0.9 #2874

Job	Run time
Build (nightly, bench,serde,bt,singlethreaded)	58s
openraft-test (stable, 0)	2m 55s
openraft-test (nightly, 30)	3m 12s
cluster-benchmark (cluster_benchmark)	55s
openraft-test (nightly, 0, single-term-leader)	3m 5s
external-stores (stores/rocksstore-v2)	6m 9s
openraft-test-bench (nightly)	1m 5s
openraft-feature-test (nightly)	53s
openraft-feature-test (nightly, serde)	1m 2s
stores (memstore)	44s
openraft-feature-test (nightly, single-term-leader)	50s
openraft-feature-test (nightly, single-term-leader,serde,singlethreaded)	54s
stores (rocksstore)	6m 7s
stores (rocksstore-compat07)	6m 10s
stores (sledstore)	57s
examples (stable, raft-kv-memstore)	2m 23s
examples (stable, raft-kv-rocksdb)	8m 4s
examples (nightly, raft-kv-memstore)	2m 7s
examples (nightly, raft-kv-rocksdb)	12m 18s
lint	6m 34s
tests-feature-test (nightly)	2m 41s
tests-feature-test (nightly, single-term-leader)	2m 39s
tests-feature-test (nightly, loosen-follower-log-revert)	2m 40s
	1h 15m 22s

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