cli::test_utils: Remove `allow(clippy::arithmetic_side_effects)` (#933) #33

Job	Run time
cargo-test-sbf (token/program)	6m 15s
check	0s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	11m 41s
test	0s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	8m 22s
cargo-test-sbf (token-upgrade/program)	11m 3s
cargo-test-sbf (feature-proposal/program)	6m 30s
cargo-test-sbf (governance/addin-mock/program, governance/program)	9m 53s
cargo-test-sbf (memo/program)	6m 18s
cargo-test-sbf (name-service/program)	6m 50s
cargo-test-sbf (stake-pool/program)	10m 26s
cargo-test-sbf (single-pool/program)	9m 52s
	1h 27m 10s

Provide feedback