Fix clippy lint in `programs/sbf` #16505

Job	Run time
test_cli (single-pool)	17m 59s
test_cli (token-2022)	14m 29s
check (associated-token-account)	1m 24s
check (feature-proposal)	2m 26s
cargo-test-sbf (associated-token-account)	7m 19s
cargo-test-sbf (feature-proposal)	6m 36s
check (instruction-padding)	59s
cargo-test-sbf (instruction-padding)	6m 33s
check (memo)	1m 14s
check (record)	1m 45s
cargo-test-sbf (memo)	6m 8s
check (single-pool)	2m 26s
cargo-test-sbf (record)	6m 3s
check (slashing)	1m 20s
cargo-test-sbf (single-pool)	7m 44s
cargo-test-sbf (slashing)	12m 24s
check (stake-pool)	2m 14s
cargo-test-sbf (stake-pool)	10m 9s
check (token-2022)	2m 34s
cargo-test-sbf (token-2022)	7m 37s
	1h 59m 23s

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