Fix hanging bench_sigverify_stage_with_same_tx #15206

Job	Run time
check	2m 59s
cargo-test-sbf (token/program)	7m 22s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	12m 14s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	17m 22s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	7m 5s
cargo-test-sbf (token-upgrade/program)	8m 20s
test (single-pool/cli, single-pool/program)	14m 51s
cargo-test-sbf (feature-proposal/program)	10m 37s
test (token-upgrade/cli, token-upgrade/program)	13m 56s
cargo-test-sbf (governance/addin-mock/program, governance/program)	11m 4s
cargo-test-sbf (name-service/program)	6m 32s
cargo-test-sbf (stake-pool/program)	10m 5s
cargo-test-sbf (single-pool/program)	8m 35s
	2h 11m 2s

Provide feedback