Automated cherry pick of #4388: Update openflow rules when Gateway updates

[luolanzone]

Cherry pick of #4388 on release-1.9.

#4388: Update openflow rules when Gateway updates

For details on the cherry pick process, see the cherry pick requests page.

[codecov]

Codecov Report

Merging #4411 (c9a2e91) into release-1.9 (4e30ce2) will decrease coverage by 0.93%.
The diff coverage is 72.50%.

@@               Coverage Diff               @@
##           release-1.9    #4411      +/-   ##
===============================================
- Coverage        63.68%   62.75%   -0.94%     
===============================================
  Files              393      404      +11     
  Lines            55538    55608      +70     
===============================================
- Hits             35372    34896     -476     
- Misses           17591    18045     +454     
- Partials          2575     2667      +92     

Flag	Coverage Δ
e2e-tests	62.15% <ø> (?)
integration-tests	34.59% <ø> (+0.06%)	⬆️
kind-e2e-tests	48.80% <0.00%> (-0.12%)	⬇️
unit-tests	46.26% <72.50%> (-1.91%)	⬇️

Impacted Files	Coverage Δ
pkg/agent/multicluster/mc_route_controller.go	55.08% <72.50%> (+2.63%)	⬆️
pkg/cni/client.go	0.00% <0.00%> (-77.78%)	⬇️
...kg/agent/flowexporter/connections/conntrack_ovs.go	0.00% <0.00%> (-70.91%)	⬇️
...md/multicluster-controller/clusterclaim_webhook.go	17.64% <0.00%> (-56.87%)	⬇️
.../cmd/multicluster-controller/clusterset_webhook.go	18.75% <0.00%> (-50.00%)	⬇️
pkg/agent/multicast/mcast_route_linux.go	0.00% <0.00%> (-47.50%)	⬇️
pkg/agent/util/ndp/ndp_linux.go	0.00% <0.00%> (-46.94%)	⬇️
pkg/agent/util/iptables/lock.go	33.33% <0.00%> (-46.67%)	⬇️
...ter/cmd/multicluster-controller/gateway_webhook.go	38.09% <0.00%> (-42.86%)	⬇️
pkg/agent/flowexporter/connections/conntrack.go	57.57% <0.00%> (-36.37%)	⬇️
... and 77 more

[tnqn]

/test-multicluster-e2e
/skip-all