Fix flaky test test_banking_stage_entries_only_central_scheduler #7209

Job	Run time
cargo-test-sbf (token/program)	9m 56s
check	8m 9s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	15m 26s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	18m 50s
test (single-pool/cli, single-pool/program)	15m 23s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	10m 7s
test (token-upgrade/cli, token-upgrade/program)	17m 21s
cargo-test-sbf (token-upgrade/program)	10m 2s
cargo-test-sbf (feature-proposal/program)	9m 29s
cargo-test-sbf (governance/addin-mock/program, governance/program)	13m 21s
cargo-test-sbf (memo/program)	10m 20s
cargo-test-sbf (name-service/program)	13m 10s
cargo-test-sbf (stake-pool/program)	12m 53s
cargo-test-sbf (single-pool/program)	11m 14s
	2h 55m 41s

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