blockstore: always send a coding shred for chained merkle root conflicts #4879

Job	Run time
check	2m 14s
cargo-test-sbf (token/program)	9m 8s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	14m 50s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	16m 32s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	9m 39s
test (single-pool/cli, single-pool/program)	16m 28s
cargo-test-sbf (token-upgrade/program)	8m 34s
test (token-upgrade/cli, token-upgrade/program)	15m 42s
cargo-test-sbf (feature-proposal/program)	6m 50s
cargo-test-sbf (governance/addin-mock/program, governance/program)	11m 56s
cargo-test-sbf (memo/program)	8m 24s
cargo-test-sbf (name-service/program)	9m 3s
cargo-test-sbf (stake-pool/program)	12m 10s
cargo-test-sbf (single-pool/program)	7m 45s
	2h 29m 15s

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