stops pushing LegacyContactInfo updates over gossip #16006

Job	Run time
cargo-test-sbf (token/program)	8m 4s
check	3m 16s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	12m 20s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	8m 28s
cargo-test-sbf (token-upgrade/program)	7m 49s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	17m 14s
cargo-test-sbf (feature-proposal/program)	7m 11s
test (single-pool/cli, single-pool/program)	15m 0s
cargo-test-sbf (governance/addin-mock/program, governance/program)	11m 23s
test (token-upgrade/cli, token-upgrade/program)	13m 50s
cargo-test-sbf (name-service/program)	7m 18s
cargo-test-sbf (stake-pool/program)	10m 40s
cargo-test-sbf (single-pool/program)	8m 8s
	2h 10m 41s

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