[ML] Don't make request on older nodes which don't have the ml cache info action (#116236)

Author: davidkyle

muted-tests.yml

@@ -226,9 +226,6 @@ tests:
 - class: org.elasticsearch.xpack.inference.TextEmbeddingCrudIT
   method: testPutE5Small_withPlatformSpecificVariant
   issue: https://github.com/elastic/elasticsearch/issues/113950
-- class: org.elasticsearch.upgrades.UpgradeClusterClientYamlTestSuiteIT
-  method: test {p0=mixed_cluster/80_transform_jobs_crud/Test GET, start, and stop old cluster batch transforms}
-  issue: https://github.com/elastic/elasticsearch/issues/115319
 - class: org.elasticsearch.smoketest.DocsClientYamlTestSuiteIT
   method: test {yaml=reference/rest-api/usage/line_38}
   issue: https://github.com/elastic/elasticsearch/issues/113694

x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/action/TransportMlMemoryAction.java

@@ -45,6 +45,7 @@
 import java.util.Map;
 import java.util.Optional;
 
+import static org.elasticsearch.Version.V_8_2_0;
 import static org.elasticsearch.xpack.core.ClientHelper.ML_ORIGIN;
 import static org.elasticsearch.xpack.core.ml.MachineLearningField.USE_AUTO_MACHINE_MEMORY_PERCENT;
 import static org.elasticsearch.xpack.ml.MachineLearning.MAX_MACHINE_MEMORY_PERCENT;
@@ -106,7 +107,11 @@ protected void masterOperation(
                 .setTimeout(request.ackTimeout())
                 .execute(delegate.delegateFailureAndWrap((delegate2, nodesStatsResponse) -> {
                     TrainedModelCacheInfoAction.Request trainedModelCacheInfoRequest = new TrainedModelCacheInfoAction.Request(
-                        nodesStatsResponse.getNodes().stream().map(NodeStats::getNode).toArray(DiscoveryNode[]::new)
+                        nodesStatsResponse.getNodes()
+                            .stream()
+                            .map(NodeStats::getNode)
+                            .filter(node -> node.getVersion().onOrAfter(V_8_2_0)) // the cache info action was added in 8.2
+                            .toArray(DiscoveryNode[]::new)
                     ).timeout(request.ackTimeout());
 
                     parentTaskClient.execute(