endpoint: make endpoint regeneration completion log debug level
endpoint: make endpoint regeneration completion log debug level

This event occurs for every endpoint regeneration, so logging at Info level is
too noisy.

Signed-off by: Ian Vernon <ian@cilium.io>

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