CLI: stop and kill should error on not found containers

[dcantah]

Today these go through and simply print nothing if you provide
container IDs that don't exist, which is a tad odd. This change
makes it so we actually send rpcs to the daemon and have it yell
at us.

➜  container git:(rm-stop-error) ✗ ./bin/container stop foo bar baz
Warning! Running debug build. Performance may be degraded.
Error: internalError: "failed to stop container" (cause: "notFound: "container with ID baz not found"")
internalError: "failed to stop container" (cause: "notFound: "container with ID foo not found"")
internalError: "failed to stop container" (cause: "notFound: "container with ID bar not found"")
➜  container git:(rm-stop-error) ✗ ./bin/container rm foo bar baz
Warning! Running debug build. Performance may be degraded.
Error: internalError: "failed to delete container" (cause: "notFound: "container with ID foo not found"")
internalError: "failed to delete container" (cause: "notFound: "container with ID baz not found"")
internalError: "failed to delete container" (cause: "notFound: "container with ID bar not found"")