[ML] Fix streaming IT (#115543) (#115663)

Fix #113430

Author: prwhelan

muted-tests.yml

@@ -227,9 +227,6 @@ tests:
 - class: org.elasticsearch.xpack.esql.ccq.MultiClusterSpecIT
   method: test {categorize.Categorize}
   issue: https://github.com/elastic/elasticsearch/issues/113428
-- class: org.elasticsearch.xpack.inference.InferenceCrudIT
-  method: testSupportedStream
-  issue: https://github.com/elastic/elasticsearch/issues/113430
 - class: org.elasticsearch.xpack.ml.integration.MlJobIT
   method: testOutOfOrderData
   issue: https://github.com/elastic/elasticsearch/issues/113477

x-pack/plugin/inference/qa/inference-service-tests/src/javaRestTest/java/org/elasticsearch/xpack/inference/InferenceCrudIT.java

@@ -307,8 +307,7 @@ public void testSupportedStream() throws Exception {
         assertEquals(modelId, singleModel.get("inference_id"));
         assertEquals(TaskType.COMPLETION.toString(), singleModel.get("task_type"));
 
-        var input = IntStream.range(1, randomInt(10)).mapToObj(i -> randomAlphaOfLength(10)).toList();
-
+        var input = IntStream.range(1, 2 + randomInt(8)).mapToObj(i -> randomAlphaOfLength(10)).toList();
         try {
             var events = streamInferOnMockService(modelId, TaskType.COMPLETION, input);