When receive delete event, we cannot get the origin object anymore, we can just delete the deployment here.

fix cleanup.sh and uninstall.sh

use constant instead a string

fix: check and load ip_tables module

fix: multus-cni subnet allocation

integrate Cilium into Kube-OVN

chore: update install

fix kubectl-ko diagnose

1. add ko reload function
2. add upgrade scripts
3. optimize install experience

change inspection logic from manually adding lsp to just readding pod…

fix pinger in dual stack cluster

Add e2e testing for dual stack underlay

fix pinger and monitor in underlay networking

fix kubectl plugin ko

adjust the location of the log

fix trace command in dual stack underlay networking

ci: push vpc-nat-gateway

replace api for get lsp id by name

grafana: optimize grafana dashboard

docs：revise vpc.md 

docs：revise vpc.md

image, externalPort, internalPort must be quote

1. add error log metrics
2. add unit to cpu usage
3. remove deprecated metrics

In netpol egress rules, except rule should be set to "!=" and should not be "==" 

Update OVN to version 21.06