HLRC: Move commercial clients from XPackClient (#32596)

The commercial clients were improperly placed into XPackClient, which is
a wrapper for the miscellaneous usage and info APIs. This commit moves
them into the HLRC.

client/rest-high-level/src/main/java/org/elasticsearch/client/RestHighLevelClient.java

@@ -203,6 +203,7 @@ public class RestHighLevelClient implements Closeable {
     private final SnapshotClient snapshotClient = new SnapshotClient(this);
     private final TasksClient tasksClient = new TasksClient(this);
     private final XPackClient xPackClient = new XPackClient(this);
+    private final WatcherClient watcherClient = new WatcherClient(this);
 
     /**
      * Creates a {@link RestHighLevelClient} given the low level {@link RestClientBuilder} that allows to build the
@@ -294,18 +295,28 @@ public final TasksClient tasks() {
     }
 
     /**
-     * A wrapper for the {@link RestHighLevelClient} that provides methods for
-     * accessing the Elastic Licensed X-Pack APIs that are shipped with the
-     * default distribution of Elasticsearch. All of these APIs will 404 if run
-     * against the OSS distribution of Elasticsearch.
+     * Provides methods for accessing the Elastic Licensed X-Pack Info
+     * and Usage APIs that are shipped with the default distribution of
+     * Elasticsearch. All of these APIs will 404 if run against the OSS
+     * distribution of Elasticsearch.
      * <p>
-     * See the <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/xpack-api.html">
-     * X-Pack APIs on elastic.co</a> for more information.
+     * See the <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/info-api.html">
+     * Info APIs on elastic.co</a> for more information.
      */
     public final XPackClient xpack() {
         return xPackClient;
     }
 
+    /**
+     * Provides methods for accessing the Elastic Licensed Watcher APIs that
+     * are shipped with the default distribution of Elasticsearch. All of
+     * these APIs will 404 if run against the OSS distribution of Elasticsearch.
+     * <p>
+     * See the <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/watcher-api.html">
+     * Watcher APIs on elastic.co</a> for more information.
+     */
+    public WatcherClient watcher() { return watcherClient; }
+
     /**
      * Executes a bulk request using the Bulk API.
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/docs-bulk.html">Bulk API on elastic.co</a>

client/rest-high-level/src/main/java/org/elasticsearch/client/XPackClient.java

@@ -41,15 +41,9 @@
 public final class XPackClient {
 
     private final RestHighLevelClient restHighLevelClient;
-    private final WatcherClient watcherClient;
 
     XPackClient(RestHighLevelClient restHighLevelClient) {
         this.restHighLevelClient = restHighLevelClient;
-        this.watcherClient = new WatcherClient(restHighLevelClient);
-    }
-
-    public WatcherClient watcher() {
-        return watcherClient;
     }
 
     /**

client/rest-high-level/src/test/java/org/elasticsearch/client/RestHighLevelClientTests.java

@@ -775,7 +775,8 @@ public void testApiNamingConventions() throws Exception {
                             method.isAnnotationPresent(Deprecated.class));
                     } else {
                         //TODO xpack api are currently ignored, we need to load xpack yaml spec too
-                        if (apiName.startsWith("xpack.") == false) {
+                        if (apiName.startsWith("xpack.") == false &&
+                            apiName.startsWith("watcher.") == false) {
                             apiNotFound.add(apiName);
                         }
                     }

client/rest-high-level/src/test/java/org/elasticsearch/client/WatcherIT.java

@@ -37,7 +37,7 @@ public void testPutWatch() throws Exception {
             "}";
         BytesReference bytesReference = new BytesArray(json);
         PutWatchRequest putWatchRequest = new PutWatchRequest(watchId, bytesReference, XContentType.JSON);
-        PutWatchResponse putWatchResponse = highLevelClient().xpack().watcher().putWatch(putWatchRequest, RequestOptions.DEFAULT);
+        PutWatchResponse putWatchResponse = highLevelClient().watcher().putWatch(putWatchRequest, RequestOptions.DEFAULT);
         assertThat(putWatchResponse.isCreated(), is(true));
         assertThat(putWatchResponse.getId(), is(watchId));
         assertThat(putWatchResponse.getVersion(), is(1L));

client/rest-high-level/src/test/java/org/elasticsearch/client/documentation/WatcherDocumentationIT.java

@@ -47,7 +47,7 @@ public void testPutWatch() throws Exception {
                 "}");
             PutWatchRequest request = new PutWatchRequest("my_watch_id", watch, XContentType.JSON);
             request.setActive(false); // <1>
-            PutWatchResponse response = client.xpack().watcher().putWatch(request, RequestOptions.DEFAULT);
+            PutWatchResponse response = client.watcher().putWatch(request, RequestOptions.DEFAULT);
             //end::x-pack-put-watch-execute
 
             //tag::x-pack-put-watch-response
@@ -83,7 +83,7 @@ public void onFailure(Exception e) {
             listener = new LatchedActionListener<>(listener, latch);
 
             // tag::x-pack-put-watch-execute-async
-            client.xpack().watcher().putWatchAsync(request, RequestOptions.DEFAULT, listener); // <1>
+            client.watcher().putWatchAsync(request, RequestOptions.DEFAULT, listener); // <1>
             // end::x-pack-put-watch-execute-async
 
             assertTrue(latch.await(30L, TimeUnit.SECONDS));