Feature: store heartbeat metric in RaftMetrics and RaftDataMetrics #3770

Job	Run time
openraft-feature-test (nightly)	55s
cluster-benchmark (cluster_benchmark)	45s
openraft-feature-test (nightly, serde)	57s
examples (stable, memstore)	40s
openraft-feature-test (nightly, single-term-leader)	49s
lint	12m 5s
examples (stable, raft-kv-memstore)	2m 33s
openraft-test (stable, 0)	3m 25s
openraft-feature-test (nightly, single-term-leader,serde,singlethreaded)	53s
examples (stable, raft-kv-memstore-network-v2)	1m 2s
openraft-test (nightly, 30)	3m 16s
examples (stable, raft-kv-memstore-opendal-snapshot-data)	1m 35s
openraft-test-bench (nightly)	57s
openraft-test (nightly, 0, single-term-leader)	3m 18s
examples (stable, raft-kv-memstore-singlethreaded)	58s
stores (stores/memstore)	56s
examples (stable, raft-kv-rocksdb)	8m 19s
stores (stores/rocksstore)	6m 10s
Build (nightly, bench,serde,bt,singlethreaded)	52s
examples (nightly, memstore)	56s
tests-feature-test (nightly)	2m 58s
stores (stores/sledstore)	1m 1s
examples (nightly, raft-kv-memstore)	2m 13s
tests-feature-test (nightly, single-term-leader)	4m 27s
tests-feature-test (nightly, loosen-follower-log-revert)	4m 15s
examples (nightly, raft-kv-memstore-network-v2)	1m 26s
examples (nightly, raft-kv-memstore-opendal-snapshot-data)	1m 54s
examples (nightly, raft-kv-memstore-singlethreaded)	1m 19s
examples (nightly, raft-kv-rocksdb)	12m 28s
	1h 23m 22s

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