Spawn `connection-checker` as an unprivileged user #58

Job	Run time
build-ios (aarch64-apple-ios)	2m 22s
build-ios (aarch64-apple-ios-sim)	1m 52s
clippy-check-ios (aarch64-apple-ios)	1m 21s
clippy-check-ios (aarch64-apple-ios-sim)	1m 19s
	6m 54s

Provide feedback