NET-11798: Set APIGateway TLSConfig if unset or empty #14096

Job	Run time
get-envoy-versions / Determine supported Envoy versions	5s
conditional-skip / Check whether to skip build and tests	28s
get-go-version / Determine Go toolchain version	6s
Setup	8s
integration-test-with-deployer	2m 27s
Generate Envoy Job Matrices	8s
dev-build / build	41s
compatibility-integration-test	13m 42s
envoy-integration-test (server, case-l7-intentions\|case-cross-peers-resolver-redirect-tcp\|case-cf...	7m 19s
envoy-integration-test (server, case-terminating-gateway-without-services\|case-api-gateway-http-t...	6m 10s
envoy-integration-test (server, case-terminating-gateway-hostnames\|case-consul-exec\|case-multidc-...	7m 0s
nomad-integration-test (v1.8.3)	1m 4s
envoy-integration-test (server, case-cfg-router-features)	1m 55s
vault-integration-test (1.17.5)	2m 12s
nomad-integration-test (v1.7.7)	2m 3s
vault-integration-test (1.16.3)	2m 25s
nomad-integration-test (v1.6.10)	1m 55s
envoy-integration-test (client, case-l7-intentions\|case-cross-peers-resolver-redirect-tcp\|case-cf...	8m 7s
vault-integration-test (1.15.6)	2m 5s
envoy-integration-test (client, case-terminating-gateway-without-services\|case-api-gateway-http-t...	6m 7s
envoy-integration-test (client, case-terminating-gateway-hostnames\|case-consul-exec\|case-multidc-...	7m 6s
envoy-integration-test (client, case-cfg-router-features)	2m 31s
test-integrations-success	1s
	1h 15m 45s

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