fix: dependency_on_unit_never_type_fallback #8870

Job	Run time
cargo-test-sbf (token/program)	8m 50s
check	4m 6s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	17m 50s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	19m 15s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	10m 47s
test (single-pool/cli, single-pool/program)	17m 17s
cargo-test-sbf (token-upgrade/program)	8m 50s
test (token-upgrade/cli, token-upgrade/program)	15m 15s
cargo-test-sbf (feature-proposal/program)	8m 43s
cargo-test-sbf (governance/addin-mock/program, governance/program)	12m 41s
cargo-test-sbf (memo/program)	7m 57s
cargo-test-sbf (name-service/program)	7m 26s
cargo-test-sbf (stake-pool/program)	10m 34s
cargo-test-sbf (single-pool/program)	8m 29s
	2h 38m 0s

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