k8s: Increase CEP GC interval to 30 minutes
k8s: Increase CEP GC interval to 30 minutes

In case the lists done by the GC controller are problematic, we now slow
this down considerably.

Signed-off-by: Ray Bejjani <7f525154e857f3d57a641a83dddc584f42addc6a@covalent.io>

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