v1.17: Add feature flag for LastIndex and Erasure duplicate proofs (backport of #34360) #5190

Job	Run time
check	0s
cargo-test-sbf (token/program)	11m 42s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	16m 5s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	12m 7s
test	0s
cargo-test-sbf (token-upgrade/program)	11m 20s
cargo-test-sbf (feature-proposal/program)	10m 23s
cargo-test-sbf (governance/addin-mock/program, governance/program)	13m 15s
cargo-test-sbf (memo/program)	9m 37s
cargo-test-sbf (name-service/program)	11m 21s
cargo-test-sbf (stake-pool/program)	11m 18s
cargo-test-sbf (single-pool/program)	9m 55s
	1h 57m 3s

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