Makefile: Generate v1 CRD explicitly
Makefile: Generate v1 CRD explicitly

This is a preparatory commit for upgrading to v1 CRDs across the board.

As of K8s 1.16, v1 CRDs are supported and the apiserver will
interoperate between v1 and v1beta1 CRDs without care from the Cilium
side [1]. For older versions of K8s (below 1.16), future commits in this
patch series will provide the ability to fallback onto v1beta1 CRDs, by
converting them on-demand from v1 CRDs. Hence why we can move to v1 CRDs
without also providing v1beta1 variants.

[1]:
https://github.com/kubernetes/kubernetes/blob/release-1.16/CHANGELOG/CHANGELOG-1.16.md#api-changes

Signed-off-by: Chris Tarazi <711c73f64afdce07b7e38039a96d2224209e9a6c@isovalent.com>

tklauser/cilium,tklauser/cilium,cilium/cilium,cilium/cilium,cilium-team/cilium,tklauser/cilium,cilium/cilium,michi-covalent/cilium,tgraf/cilium,cilium/cilium,michi-covalent/cilium,tgraf/cilium,tgraf/cilium,tgraf/cilium,tgraf/cilium,tgraf/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium-team/cilium,cilium/cilium,michi-covalent/cilium,tklauser/cilium,tklauser/cilium