Fix: Load mebmership since `last_applied`, not `last_membership.index… #178

Job	Run time
cluster-benchmark (cluster_benchmark)	53s
examples (stable, memstore)	37s
examples (stable, raft-kv-memstore)	2m 12s
examples (stable, raft-kv-memstore-generic-snapshot-data)	1m 0s
examples (stable, raft-kv-memstore-opendal-snapshot-data)	1m 29s
examples (stable, raft-kv-memstore-singlethreaded)	58s
examples (stable, raft-kv-rocksdb)	8m 11s
lint	12m 12s
examples (nightly, memstore)	55s
examples (nightly, raft-kv-memstore)	2m 14s
examples (nightly, raft-kv-memstore-generic-snapshot-data)	1m 24s
openraft-feature-test (nightly)	54s
openraft-feature-test (nightly, serde)	56s
examples (nightly, raft-kv-memstore-opendal-snapshot-data)	2m 1s
openraft-feature-test (nightly, single-term-leader)	54s
examples (nightly, raft-kv-memstore-singlethreaded)	1m 21s
openraft-feature-test (nightly, single-term-leader,serde,singlethreaded)	56s
examples (nightly, raft-kv-rocksdb)	12m 40s
openraft-test (stable, 0)	3m 9s
openraft-test-bench (nightly)	58s
openraft-test (nightly, 30)	3m 33s
openraft-test (nightly, 0, single-term-leader)	3m 27s
stores (stores/memstore)	56s
stores (stores/rocksstore)	6m 21s
Build (nightly, bench,serde,bt,singlethreaded)	53s
tests-feature-test (nightly)	3m 14s
stores (stores/sledstore)	1m 7s
tests-feature-test (nightly, single-term-leader)	3m 10s
tests-feature-test (nightly, loosen-follower-log-revert)	3m 11s
	1h 21m 46s

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