fix the broken tests in eventhubs (Azure#31930)

Author: Yao725

sdk/eventhub/Azure.ResourceManager.EventHubs/tests/Helpers/EventHubTestBase.cs

@@ -11,6 +11,7 @@
 using Azure.ResourceManager.EventHubs.Models;
 using Azure.Core;
 using System.Security.Cryptography;
+using Azure.ResourceManager.ManagedServiceIdentities;
 
 namespace Azure.ResourceManager.EventHubs.Tests.Helpers
 {
@@ -42,7 +43,13 @@ public EventHubTestBase(bool isAsync, RecordedTestMode? mode = default) : base(i
         [SetUp]
         public async Task CreateCommonClient()
         {
-            Client = GetArmClient();
+            // Currently our pipeline will run this test project with project reference
+            // And we jsut upgraded the version of ManagedServiceIdentities, therefore the related tests will fail
+            // Use the version override as a work around because we lack the test resource now.
+            ArmClientOptions options = new ArmClientOptions();
+            options.SetApiVersion(UserAssignedIdentityResource.ResourceType, "2018-11-30");
+
+            Client = GetArmClient(options);
             DefaultSubscription = await Client.GetDefaultSubscriptionAsync();
         }
         public async Task<ResourceGroupResource> CreateResourceGroupAsync()