wen_restart: correctly handle HeaviestFork received from the coordinator. #11793

Job	Run time
check	3m 14s
cargo-test-sbf (token/program)	10m 16s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	18m 56s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	16m 16s
test (single-pool/cli, single-pool/program)	18m 17s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	10m 12s
test (token-upgrade/cli, token-upgrade/program)	18m 31s
cargo-test-sbf (token-upgrade/program)	8m 23s
cargo-test-sbf (feature-proposal/program)	8m 16s
cargo-test-sbf (governance/addin-mock/program, governance/program)	11m 30s
cargo-test-sbf (memo/program)	9m 54s
cargo-test-sbf (name-service/program)	7m 33s
cargo-test-sbf (stake-pool/program)	10m 46s
cargo-test-sbf (single-pool/program)	10m 12s
	2h 42m 16s

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