add DeliverLatest as common function for use by Manager and ProxyTracker Open #8101

Job	Run time
Get files changed and conditionally skip CI	27s
Setup	8s
Generate Envoy Job Matrices	5s
integration-test-with-deployer	3m 5s
dev-build / build	1m 28s
nomad-integration-test (v1.6.2)	43s
vault-integration-test (1.15.0)	2m 43s
nomad-integration-test (v1.5.9)	51s
compatibility-integration-test	17m 42s
vault-integration-test (1.14.4)	2m 31s
envoy-integration-test (1.27.2, server, case-ingress-gateway-sds\|case-grpc\|case-cfg-resolver-feat...	6m 46s
nomad-integration-test (v1.4.13)	1m 6s
vault-integration-test (1.13.8)	2m 31s
envoy-integration-test (1.27.2, server, case-terminating-gateway-subsets\|case-cfg-resolver-subset...	6m 22s
envoy-integration-test (1.27.2, server, docs\|case-api-gateway-http-tls-overlapping-hosts\|case-htt...	4m 59s
envoy-integration-test (1.27.2, server, case-gateway-without-services\|case-consul-exec)	2m 5s
vault-integration-test (1.12.11)	2m 26s
envoy-integration-test (1.27.2, client, case-ingress-gateway-sds\|case-grpc\|case-cfg-resolver-feat...	6m 53s
envoy-integration-test (1.27.2, client, case-terminating-gateway-subsets\|case-cfg-resolver-subset...	7m 7s
envoy-integration-test (1.27.2, client, docs\|case-api-gateway-http-tls-overlapping-hosts\|case-htt...	4m 52s
envoy-integration-test (1.27.2, client, case-gateway-without-services\|case-consul-exec)	1m 40s
test-integrations-success	1s
	1h 16m 31s

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