Test

sdk: fail fast when spawn manager is disabled #1754

Job	Run time
Rust Tests (relay-pty) (ubuntu-latest)	49s
Coverage (upload)	2m 25s
lint	28s
Rust Tests (relay-pty) (macos-latest)	1m 18s
test (macos-latest, 20)	2m 19s
test (macos-latest, 22)	3m 8s
test (ubuntu-latest, 22)	2m 28s
test (ubuntu-latest, 20)	2m 25s
	15m 20s

Provide feedback