validator: Split PoH speed measurement from check #15403

Job	Run time
cargo-test-sbf (token/program)	6m 59s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	12m 29s
check	3m 18s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	8m 4s
cargo-test-sbf (token-upgrade/program)	7m 29s
cargo-test-sbf (feature-proposal/program)	6m 52s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	16m 48s
cargo-test-sbf (governance/addin-mock/program, governance/program)	10m 15s
cargo-test-sbf (name-service/program)	6m 54s
test (single-pool/cli, single-pool/program)	16m 12s
test (token-upgrade/cli, token-upgrade/program)	15m 8s
cargo-test-sbf (stake-pool/program)	10m 3s
cargo-test-sbf (single-pool/program)	8m 9s
	2h 8m 40s

Provide feedback