daemon: Init endpoint queue during validation
daemon: Init endpoint queue during validation

This commit fixes the following errors:

```
evel=error msg="Unable to enqueue endpoint policy visibility event"
containerID=9f680a5847 datapathPolicyRevision=0 desiredPolicyRevision=0
endpointID=3479 error="unable to Enqueue event" identity=8771
ipv4=10.116.2.10 ipv6=
k8sPodName=cilium-monitoring/grafana-6d49bd9ff7-s8zsd subsys=endpoint
```

These errors occurred because during endpoint validation (when the
endpoint is being restored), its event queue has not been initialized
yet. Once the endpoint is eventually exposed endpoint manager (after
restoration), it will begin processing the events off the queue.

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

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