pkg/kvstore: wait for node delete delay in unit tests
pkg/kvstore: wait for node delete delay in unit tests

Since Close() deletes all keys from the kvstore the global kvstore
client will still receive delete events from the kvstore across unit
tests, causing keys from being deleted across unit tests.

Fixes: 07312c6d155d ("pkg/{kvstore,node}: delay node delete event in kvstore")
Signed-off-by: André Martins <bc9800b9d52a24cce72a73dd528afed53f10e5fc@cilium.io>

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