policy: Add support for HTTPRetryFilter #2389

Job	Run time
cleanup	3s
tag	3s
changed-viz	14s
changed-policy	16s
changed-multicluster	11s
build-cli	4m 11s
build-ext (jaeger-webhook)	4m 11s
build-ext (metrics-api)	10m 8s
build-ext (tap)	4m 52s
build-ext (web)	7m 14s
build-core (cni-plugin)	4m 36s
build-core (controller)	4m 26s
build-core (policy-controller)	10m 47s
build-core (proxy)	3m 9s
test-core (cni-calico-deep)	5m 16s
test-core (deep)	4m 49s
test-policy (v1.21)	10m 19s
test-policy (v1.26)	10m 36s
test-ext (cluster-domain)	4m 55s
test-ext (default-policy-deny)	4m 44s
test-ext (external)	6m 8s
test-ext (rsa-ca)	4m 2s
test-ext (helm-upgrade)	6m 10s
test-ext (uninstall)	4m 49s
test-ext (upgrade-edge)	6m 31s
test-ext (upgrade-stable)	7m 2s
test-viz	0s
test-multicluster	0s
	2h 9m 42s

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