blockstore: populate duplicate shred proofs for merkle root conflicts #5456

Job	Run time
test	0s
cargo-test-sbf (token/program)	10m 4s
check	0s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	15m 20s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	9m 29s
cargo-test-sbf (token-upgrade/program)	9m 58s
cargo-test-sbf (feature-proposal/program)	10m 0s
cargo-test-sbf (governance/addin-mock/program, governance/program)	13m 14s
cargo-test-sbf (memo/program)	7m 37s
cargo-test-sbf (name-service/program)	8m 13s
cargo-test-sbf (stake-pool/program)	12m 9s
cargo-test-sbf (single-pool/program)	9m 4s
	1h 45m 8s

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