EventHubs health check doesn't specify EntityPath / EventHubName causing failure

[eerhardt]

When you reference an EventHubs namespace, use the emulator, and use an EventHub consumer client, the new EventHubs health checks doesn't create the connection string correctly.

We have this code for the "real clients":

aspire/src/Components/Aspire.Azure.Messaging.EventHubs/EventHubProducerClientComponent.cs

Lines 36 to 48 in 25c6c40

	// If no connection is provided use TokenCredential
	if (string.IsNullOrEmpty(settings.ConnectionString))
	{
	return new EventHubProducerClient(settings.FullyQualifiedNamespace, settings.EventHubName, cred, options);
	}
	// If no specific EventHubName is provided, it has to be in the connection string
	if (string.IsNullOrEmpty(settings.EventHubName))
	{
	return new EventHubProducerClient(settings.ConnectionString, options);
	}
	return new EventHubProducerClient(settings.ConnectionString, settings.EventHubName, options);

But when we create the EventHubProducerClient for the health check, we aren't doing the check for the EventHubName:

aspire/src/Components/Aspire.Azure.Messaging.EventHubs/EventHubsComponent.cs

Lines 45 to 47 in 25c6c40

	_healthCheckClient = !string.IsNullOrEmpty(settings.ConnectionString) ?
	new EventHubProducerClient(settings.ConnectionString, producerClientOptions) :
	new EventHubProducerClient(settings.FullyQualifiedNamespace, settings.EventHubName, settings.Credential ?? new DefaultAzureCredential(), producerClientOptions);

Repro Steps

AppHost:

var eventhubns = builder.AddAzureEventHubs("eventhubns")
    .RunAsEmulator();

eventhubns.AddHub("eventhub");

builder.AddProject<Projects.EventHubsConsumer>("consumer")
    .WithReference(eventhubns).WaitFor(eventhubns);

Consumer App:

var builder = WebApplication.CreateBuilder(args);

builder.AddServiceDefaults();

builder.AddAzureEventHubBufferedProducerClient("eventhubns", settings => settings.EventHubName = "eventhub");

...

F5 and hit the Consumer App's /health endpoint.

Expected results

Should be Healthy

Actual results

An unhandled exception occurred while processing the request.
ArgumentException: The connection string used for an Event Hub client must specify the Event Hubs namespace host, and either a Shared Access Key (both the name and value) or Shared Access Signature to be valid. The path to an Event Hub must be included in the connection string or specified separately. (Parameter 'connectionString')

[eerhardt]

cc @sebastienros @oising