containerd: Skip containerd events we cannot unmarshal
containerd: Skip containerd events we cannot unmarshal

When the containerd watcher failed to parse events it would log an error
but continue to process the struct that should have been populated. We
now read from the scanner again, with a sleep to throttle error loops.

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

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