option in cloudflared service install to not start cloudflared

Describe the feature you'd like When using cloudflared service install, cloudflared also attempts to start the start the service (equivalent to systemd enable --now [service]. For our use case, where we are provisioning devices its faster to not have to wait for cloudflared to come up (and also we see some transient errors where a timeout can happen and fail the entire process.

Describe alternatives you've considered We could installed the systemd service ourselves, but I think this option would benefit others and also ensure our unit files are always up to date.