NET-11798: Set APIGateway TLSConfig if unset or empty #14094

Job	Run time
conditional-skip / Check whether to skip build and tests	29s
get-envoy-versions / Determine supported Envoy versions	6s
get-go-version / Determine Go toolchain version	6s
Setup	7s
Generate Envoy Job Matrices	7s
integration-test-with-deployer	2m 20s
dev-build / build	39s
compatibility-integration-test	9m 39s
nomad-integration-test (v1.8.3)	2m 22s
vault-integration-test (1.17.5)	2m 14s
nomad-integration-test (v1.7.7)	1m 51s
vault-integration-test (1.16.3)	2m 6s
envoy-integration-test (server, case-l7-intentions\|case-cross-peers-resolver-redirect-tcp\|case-cf...	7m 43s
nomad-integration-test (v1.6.10)	1m 49s
vault-integration-test (1.15.6)	2m 7s
envoy-integration-test (server, case-terminating-gateway-without-services\|case-api-gateway-http-t...	5m 48s
envoy-integration-test (server, case-terminating-gateway-hostnames\|case-consul-exec\|case-multidc-...	7m 13s
envoy-integration-test (server, case-cfg-router-features)	2m 18s
envoy-integration-test (client, case-l7-intentions\|case-cross-peers-resolver-redirect-tcp\|case-cf...	7m 58s
envoy-integration-test (client, case-terminating-gateway-without-services\|case-api-gateway-http-t...	6m 1s
envoy-integration-test (client, case-terminating-gateway-hostnames\|case-consul-exec\|case-multidc-...	7m 41s
envoy-integration-test (client, case-cfg-router-features)	2m 34s
test-integrations-success	1s
	1h 13m 19s

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