Make installer idempotent #12
Description
I've ran into some issues before where I've got to remove the CSR to let it regen everything. There's probably a number of these we can fix up in the installer
Feedback from @dcbw
at the very least if the secret exists, bail
eg if we have a secret already, then we don't need to do any of the CSR stuff
it should perhaps still reconcile (and recrete) the webhook config and service, if they don't exist