Make LocalMetadataServer not reachable from outside of the process #9252

Job	Run time
Build and test (warp-ubuntu-latest-x64-16x)	7m 3s
Check workspace-hack	46s
Validate Restate UI artifact	5s
Create docker image / build-and-push-image	15m 32s
Run SDK-Go integration tests / Features integration test	3m 13s
Run SDK-Java integration tests with DisableIdempotencyTable / Features integration test	5m 40s
Run SDK-Java integration tests with InvocationStatusKilled / Features integration test	5m 48s
Run SDK-Java integration tests / Features integration test	7m 35s
Run SDK-Java integration tests with KafkaIngressNext / Features integration test	5m 30s
Run SDK-Python integration tests / Features integration test	6m 29s
Run SDK-Rust integration tests / Features integration test	5m 13s
Run SDK-Typescript integration tests / Features integration test	4m 50s
	1h 7m 44s

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