Fix flaky with no shards available exception

Author: jonathan-buttner

muted-tests.yml

@@ -370,12 +370,6 @@ tests:
 - class: org.elasticsearch.xpack.esql.ccq.MultiClusterSpecIT
   method: test {csv-spec:spatial.ConvertFromStringParseError}
   issue: https://github.com/elastic/elasticsearch/issues/139213
-- class: org.elasticsearch.xpack.inference.integration.AuthorizationTaskExecutorIT
-  method: testCreatesEisChatCompletionEndpoint
-  issue: https://github.com/elastic/elasticsearch/issues/138764
-- class: org.elasticsearch.xpack.inference.integration.AuthorizationTaskExecutorIT
-  method: testCreatesChatCompletion_AndThenCreatesTextEmbedding
-  issue: https://github.com/elastic/elasticsearch/issues/138012
 - class: org.elasticsearch.xpack.security.CoreWithSecurityClientYamlTestSuiteIT
   method: test {yaml=search.retrievers/result-diversification/10_mmr_result_diversification_retriever/Test MMR result diversification single index float type}
   issue: https://github.com/elastic/elasticsearch/issues/139527

x-pack/plugin/inference/src/internalClusterTest/java/org/elasticsearch/xpack/inference/integration/AuthorizationTaskExecutorIT.java

@@ -195,7 +195,7 @@ private List<UnparsedModel> getEisEndpoints() {
 
     static List<UnparsedModel> getEisEndpoints(ModelRegistry modelRegistry) {
         var listener = new PlainActionFuture<List<UnparsedModel>>();
-        modelRegistry.getAllModels(false, listener);
+        modelRegistry.getAllModels(true, listener);
 
         var endpoints = listener.actionGet(TimeValue.THIRTY_SECONDS);
         return endpoints.stream().filter(m -> m.service().equals(ElasticInferenceService.NAME)).toList();