Timestream doesn't support running with localstack

[yibo-long]

Describe the bug

When running with localstack-pro for Timestream, it throws below errors:

http://localhost:4566 is not a valid inet host
java.lang.IllegalArgumentException: http://localhost:4566 is not a valid inet host
	at aws.smithy.kotlin.runtime.net.HostKt.hostParseImpl(Host.kt:35)
	at aws.smithy.kotlin.runtime.net.HostKt.access$hostParseImpl(Host.kt:1)
	at aws.smithy.kotlin.runtime.net.Host$Companion.parse(Host.kt:14)
	at aws.sdk.kotlin.services.timestreamwrite.endpoints.TimestreamWriteEndpointDiscoverer.discoverHost(TimestreamWriteEndpointDiscoverer.kt:48)
	at aws.sdk.kotlin.services.timestreamwrite.endpoints.TimestreamWriteEndpointDiscoverer.access$discoverHost(TimestreamWriteEndpointDiscoverer.kt:25)
	at aws.sdk.kotlin.services.timestreamwrite.endpoints.TimestreamWriteEndpointDiscoverer$discoverHost$1.invokeSuspend(TimestreamWriteEndpointDiscoverer.kt)
	at _COROUTINE._BOUNDARY._(CoroutineDebugging.kt:42)
	at aws.smithy.kotlin.runtime.http.middleware.RetryMiddleware$handle$result$outcome$1.invokeSuspend(RetryMiddleware.kt:144)
	at aws.smithy.kotlin.runtime.retries.StandardRetryStrategy.doTryLoop(StandardRetryStrategy.kt:60)
	at aws.smithy.kotlin.runtime.retries.StandardRetryStrategy.retry$suspendImpl(StandardRetryStrategy.kt:40)
	at aws.smithy.kotlin.runtime.http.middleware.RetryMiddleware.handle(RetryMiddleware.kt:50)
	at aws.smithy.kotlin.runtime.io.middleware.ModifyRequestMiddleware.handle(ModifyRequest.kt:26)
	at aws.smithy.kotlin.runtime.io.middleware.ModifyRequestMiddleware.handle(ModifyRequest.kt:26)
	at aws.smithy.kotlin.runtime.io.middleware.ModifyRequestMiddleware.handle(ModifyRequest.kt:26)
	at aws.smithy.kotlin.runtime.http.operation.SerializeHandler.call(SdkOperationExecution.kt:251)
	at aws.smithy.kotlin.runtime.http.operation.OperationHandler.call(SdkOperationExecution.kt:207)
	at aws.smithy.kotlin.runtime.http.operation.SdkHttpOperationKt$execute$$inlined$withSpan$1.invokeSuspend(SdkHttpOperation.kt:76)
	at aws.smithy.kotlin.runtime.http.operation.SdkHttpOperationKt.execute(SdkHttpOperation.kt:219)
	at io.span.services.traithandlers.metering.TimestreamSeeder$seed$2.invokeSuspend(TimestreamSeeder.kt:277)
	at io.span.services.traithandlers.metering.MeteringTraitHandlerEndpointTest$beforeAll$1.invokeSuspend(MeteringTraitHandlerEndpointTest.kt:59)
Caused by: java.lang.IllegalArgumentException: http://localhost:4566 is not a valid inet host
	at aws.smithy.kotlin.runtime.net.HostKt.hostParseImpl(Host.kt:35)
	at aws.smithy.kotlin.runtime.net.HostKt.access$hostParseImpl(Host.kt:1)
	at aws.smithy.kotlin.runtime.net.Host$Companion.parse(Host.kt:14)
	at aws.sdk.kotlin.services.timestreamwrite.endpoints.TimestreamWriteEndpointDiscoverer.discoverHost(TimestreamWriteEndpointDiscoverer.kt:48)
	at aws.sdk.kotlin.services.timestreamwrite.endpoints.TimestreamWriteEndpointDiscoverer.access$discoverHost(TimestreamWriteEndpointDiscoverer.kt:25)
	at aws.sdk.kotlin.services.timestreamwrite.endpoints.TimestreamWriteEndpointDiscoverer$discoverHost$1.invokeSuspend(TimestreamWriteEndpointDiscoverer.kt)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.UndispatchedCoroutine.afterResume(CoroutineContext.kt:266)
	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:99)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
	at kotlinx.coroutines.UndispatchedCoroutine.afterResume(CoroutineContext.kt:266)
	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:99)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:104)
	at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:111)
	at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:99)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:584)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:811)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:715)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:702)

This happens for both timestream-query and timestream-write

the client is created as:

TimestreamWriteClient {
        region = awsRegion
        timestreamEndpoint?.let {
            endpointUrl = Url.parse(it)
        }
    }

Regression Issue

• [ ] Select this option if this issue appears to be a regression.

Expected behavior

it should be run correctly as similar codes with software.amazon.awssdk:timestreamwrite or software.amazon.awssdk:timestreamquery.

Current behavior

Throws the error.

Steps to Reproduce

run with the code below with localstack-pro testcontainer

val container: LocalStackContainer
// awsRegion and timestreamEndpoint are from localstack testcontainer
val client = TimestreamWriteClient {
    region = container.region
    endpointUrl = Url.parse(container.endpoint.toString())
}
client.createDatabase {
    databaseName = "test-db"
}

Possible Solution

It seems to be that kotlin sdk didn't disable endpoint discovery like aws-sdk-java-v2:

for those EndpointDiscoverer in kotlin sdk, it should not try to discover host with describeEndpoints if endpoint is already overriden.

Context

No response

AWS SDK for Kotlin version

1.3.21

Platform (JVM/JS/Native)

JDK21

Operating system and version

linux/mac