The Product Security Team got a report about these unauthenticated
discovery roles. The reporter was surprised about getting 200 requests
when unauthenticated. And given the light documentation on the intention
of these roles it is justifiable.
Increase documentation on these roles.
* update admission-controller links
(cherry picked from commit 37043991a61e5e6f4ac1c463b14c65430b192553)
* updated links found using greedier regex
(cherry picked from commit 45c6d4cf7430245a3b4e81eae245000beea88841)
* correct link in cn/docs/admin/authorization/_index.md
* fix incorrect changes introduced in eac3619
* undo update of cn content
* fix link
* fix admission webhook link