retryable_indexes allocated and dropped by scheduler #15280

Job	Run time
cargo-test-sbf (token/program)	7m 14s
check	4m 1s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	13m 36s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	8m 6s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	19m 2s
cargo-test-sbf (token-upgrade/program)	7m 47s
test (single-pool/cli, single-pool/program)	18m 53s
cargo-test-sbf (feature-proposal/program)	7m 0s
test (token-upgrade/cli, token-upgrade/program)	17m 31s
cargo-test-sbf (governance/addin-mock/program, governance/program)	12m 40s
cargo-test-sbf (name-service/program)	9m 6s
cargo-test-sbf (stake-pool/program)	12m 4s
cargo-test-sbf (single-pool/program)	9m 51s
	2h 26m 51s

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