Bring sanity to config/ (#6424)
Bring sanity to config/ (#6424)

* Bring sanity to config.

This adds some more structure to config/ as defined in the new README.md (so I won't repeat here).

This first commit breaks back-compat so that you can actually see the "moves" in git.

* Add symlinks based on all of the moves to preserve back-compat.

* Drop ko://

* Add missing activator-hpa symlinkl

* Rename namespace-wildcards to include certs

* Pick up the new service for autoscaler-hpa

knative-sandbox/net-certmanager,knative-sandbox/net-certmanager