Chore: replace usage of `LogId.leader_id` with `LogId.leader_id()` #4339

Job	Run time
Build (nightly, bench,serde,bt,singlethreaded)	49s
cluster-benchmark (cluster_benchmark)	46s
examples (stable, memstore)	48s
lint	3m 56s
examples (stable, rocksstore)	5m 45s
openraft-feature-test (nightly)	51s
examples (stable, raft-kv-memstore)	2m 38s
openraft-feature-test (nightly, serde)	51s
openraft-test-bench (nightly)	59s
examples (stable, raft-kv-memstore-grpc)	1m 56s
openraft-feature-test (nightly, serde,singlethreaded)	49s
examples (stable, raft-kv-memstore-network-v2)	1m 2s
examples (stable, raft-kv-memstore-opendal-snapshot-data)	1m 18s
rt-monoio	41s
examples (stable, raft-kv-memstore-singlethreaded)	1m 0s
stores (stores/memstore)	51s
examples (stable, raft-kv-rocksdb)	7m 47s
examples (nightly, memstore)	55s
test-crate-tests (stable, 0)	3m 16s
test-crate-tests (nightly, 30)	3m 13s
examples (nightly, rocksstore)	10m 19s
test-crate-openraft (stable)	56s
test-crate-tests (nightly, 0, single-term-leader)	3m 9s
examples (nightly, raft-kv-memstore)	2m 21s
test-crate-openraft (nightly)	49s
examples (nightly, raft-kv-memstore-grpc)	1m 44s
examples (nightly, raft-kv-memstore-network-v2)	1m 15s
tests-feature-test (nightly)	2m 57s
examples (nightly, raft-kv-memstore-opendal-snapshot-data)	1m 29s
tests-feature-test (nightly, single-term-leader)	2m 58s
examples (nightly, raft-kv-memstore-singlethreaded)	1m 9s
examples (nightly, raft-kv-rocksdb)	11m 8s
	1h 20m 25s

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