policy: Add support for HTTPRetryFilter #2384

Job	Run time
cleanup	3s
changed-viz	15s
changed-policy	16s
changed-multicluster	16s
tag	5s
build-ext (jaeger-webhook)	3m 49s
build-ext (metrics-api)	3m 55s
build-ext (tap)	4m 13s
build-ext (web)	6m 58s
build-cli	4m 22s
build-core (cni-plugin)	4m 12s
build-core (controller)	4m 31s
build-core (policy-controller)	11m 8s
build-core (proxy)	3m 38s
test-ext (cluster-domain)	5m 32s
test-ext (default-policy-deny)	5m 54s
test-ext (external)	6m 26s
test-ext (rsa-ca)	3m 55s
test-ext (helm-upgrade)	6m 34s
test-ext (uninstall)	5m 24s
test-ext (upgrade-edge)	7m 2s
test-ext (upgrade-stable)	6m 7s
test-policy (v1.21)	12m 42s
test-policy (v1.26)	11m 11s
test-core (cni-calico-deep)	6m 41s
test-core (deep)	6m 6s
test-multicluster	0s
test-viz	0s
	2h 11m 15s

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