Not needed for CAPI GA

Context: https://github.com/openshift/cluster-api/pull/259#discussion_r2759039924

Some discussion to be had, do we want to: 

• Make the flag fully qualified
• change the flag to -protect-cluster-kind

Steps:

• Decide what we do with the flag
• Update manifests-gen
• Update operands (make files in each repo)

Extra context: 

I have an ulterior motive here, btw: I would very much like to see us push all provider-specific code and configuration into provider repos. Over time, I think this will enable the team to scale better, as well as giving platform teams more agency over their own changes. We still need interfaces, though, and this is one of the more important ones. So I do care about it, perhaps more than folks who didn't come from a platform team. This is also why I've been writing docs for it.

 
Maybe make the flag explicitly Kind? And then it's obvious the casing and we don't expect more than one kind to be the same in a single repo I suspect
 
My reason for preferring kind btw is that resource singular isn't something we normally see, so the casing looks off. Renaming the flag to include `-kind` should give an appropriate hint to the format expected