Shorten the ClusterInfoVoteListener leader lookahead window #8289

Job	Run time
check	2m 44s
cargo-test-sbf (token/program)	9m 54s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	15m 26s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	19m 20s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	9m 5s
test (single-pool/cli, single-pool/program)	14m 37s
cargo-test-sbf (token-upgrade/program)	10m 14s
test (token-upgrade/cli, token-upgrade/program)	16m 55s
cargo-test-sbf (feature-proposal/program)	7m 15s
cargo-test-sbf (governance/addin-mock/program, governance/program)	13m 50s
cargo-test-sbf (memo/program)	10m 12s
cargo-test-sbf (name-service/program)	7m 39s
cargo-test-sbf (stake-pool/program)	11m 17s
cargo-test-sbf (single-pool/program)	10m 55s
	2h 39m 23s

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