Nightly flake: dialogflow.cx.v3beta1.it.ITSystemTest

[burkedavison]

https://fusion2.corp.google.com/invocations/669bed9d-c488-42c2-a182-f7e12a239838/targets/cloud-devrel%2Fclient-libraries%2Fjava%2Fgoogle-cloud-java%2Fnightly%2Fgraalvm-sub-jobs%2Fnative-b%2Fgraalvm-native-8;config=default/log

JUnit Vintage:ITSystemTest
    ClassSource [className = 'com.google.cloud.dialogflow.cx.v3beta1.it.ITSystemTest', filePosition = null]
    => org.opentest4j.MultipleFailuresError: Multiple Failures (2 failures)
	java.util.concurrent.ExecutionException: com.google.api.gax.rpc.InternalException: Operation with name "projects/cloud-java-ci-[test/locations/global/operations/20240810](http://test/locations/global/operations/20240810)-01011723276903-66ad3b6f-0000-242e-9561-3c286d34f98e" failed with status = GrpcStatusCode{transportCode=INTERNAL} and message = Internal error encountered.
	java.lang.NullPointerException: <no message>
         com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:594)
         com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:573)
         com.google.common.util.concurrent.FluentFuture$TrustedFuture.get(FluentFuture.java:91)
         com.google.common.util.concurrent.ForwardingFuture.get(ForwardingFuture.java:67)
         com.google.api.gax.longrunning.OperationFutureImpl.get(OperationFutureImpl.java:125)
         [...]
       Caused by: com.google.api.gax.rpc.InternalException: Operation with name "projects/cloud-java-ci-[test/locations/global/operations/20240810](http://test/locations/global/operations/20240810)-01011723276903-66ad3b6f-0000-242e-9561-3c286d34f98e" failed with status = GrpcStatusCode{transportCode=INTERNAL} and message = Internal error encountered.
         com.google.api.gax.rpc.ApiExceptionFactory.createException(ApiExceptionFactory.java:70)
         com.google.api.gax.grpc.ProtoOperationTransformers$ResponseTransformer.apply(ProtoOperationTransformers.java:55)
         com.google.api.gax.grpc.ProtoOperationTransformers$ResponseTransformer.apply(ProtoOperationTransformers.java:44)
         com.google.api.core.ApiFutures$ApiFunctionToGuavaFunction.apply(ApiFutures.java:396)
         com.google.common.util.concurrent.AbstractTransformFuture$TransformFuture.doTransform(AbstractTransformFuture.java:254)
         [...]
         com.google.cloud.dialogflow.cx.v3beta1.DeleteVersionRequest$Builder.setName(DeleteVersionRequest.java:546)
         com.google.cloud.dialogflow.cx.v3beta1.it.ITSystemTest.tearDown(ITSystemTest.java:231)
         java.base@17.0.8/java.lang.reflect.Method.invoke([Method.java:568](https://cs.corp.google.com/#search/&sq=package:%5Epiper$%20project:openjdk21&q=java/lang/reflect/Method.java:568))