Automatic merge from submit-queue (batch tested with PRs 44940, 44974, 44935)

Remove import of internal api package in generated external-versioned listers

Follow up of https://github.com/kubernetes/kubernetes/pull/44523

One line change in cmd/libs/go2idl/lister-gen/generators/lister.go, and simple changes in pkg/apis/autoscaling/v2alpha1/register.go, other changes are generated.

The internal api package will be eliminated from client-go, so these imports should be removed. Also, it's more correct to report the versioned resource in the error.