[ML] Fix Cohere upgrade tests (#130621)

Author: davidkyle

x-pack/plugin/inference/qa/rolling-upgrade/src/javaRestTest/java/org/elasticsearch/xpack/application/CohereServiceUpgradeIT.java

@@ -70,6 +70,7 @@ public static void shutdown() {
     @SuppressWarnings("unchecked")
     public void testCohereEmbeddings() throws IOException {
         var embeddingsSupported = getOldClusterTestVersion().onOrAfter(COHERE_EMBEDDINGS_ADDED);
+        assumeTrue("Cohere embedding service added in " + COHERE_EMBEDDINGS_ADDED, embeddingsSupported);
         // `gte_v` indicates that the cluster version is Greater Than or Equal to MODELS_RENAMED_TO_ENDPOINTS
         String oldClusterEndpointIdentifier = oldClusterHasFeature("gte_v" + MODELS_RENAMED_TO_ENDPOINTS) ? "endpoints" : "models";
         ApiVersion oldClusterApiVersion = oldClusterHasFeature(COHERE_V2_API_ADDED_TEST_FEATURE) ? ApiVersion.V2 : ApiVersion.V1;