The returned error in the signature is left over from previous
implementations and was only returning nil.
If we know NewFlow will succeed we can fire a create hook (implemented
in a future commit) before NewFlow, which will prevent a remove hook for
a flow from firing before the create hook for the same flow.
Updates tailscale/corp#38630
Signed-off-by: Michael Ben-Ami <mzb@tailscale.com>
Michael Ben-Amiandmzbenami
2a0eafc20f