Add thread manager crate to agave #15286

Job	Run time
check	3m 35s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	19m 32s
cargo-test-sbf (token/program)	7m 27s
test (single-pool/cli, single-pool/program)	19m 27s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	14m 20s
test (token-upgrade/cli, token-upgrade/program)	18m 22s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	9m 2s
cargo-test-sbf (token-upgrade/program)	8m 20s
cargo-test-sbf (feature-proposal/program)	7m 20s
cargo-test-sbf (governance/addin-mock/program, governance/program)	10m 55s
cargo-test-sbf (name-service/program)	6m 59s
cargo-test-sbf (stake-pool/program)	12m 7s
cargo-test-sbf (single-pool/program)	8m 25s
	2h 25m 51s

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