Add recursive checkout for downstream-project-spl.yaml #14

Job	Run time
test (token/cli, token/program, token/program-2022, associated-token-account/program)	45m 17s
test (single-pool/cli, single-pool/program)	32m 13s
test (token-upgrade/cli, token-upgrade/program)	30m 26s
cargo-test-sbf (token/program)	29m 23s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	51m 26s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	30m 6s
cargo-test-sbf (token-upgrade/program)	28m 47s
cargo-test-sbf (feature-proposal/program)	33m 39s
cargo-test-sbf (governance/addin-mock/program, governance/program)	51m 22s
cargo-test-sbf (memo/program)	32m 57s
cargo-test-sbf (name-service/program)	28m 36s
cargo-test-sbf (stake-pool/program)	42m 44s
cargo-test-sbf (single-pool/program)	36m 23s
check	24m 35s
	8h 17m 54s

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