Add slices to delete and update by query in HLRC (#48420)

The slices param was missing from both delete by query and update by
query in the HLRC request converters. This commit fixes the omission.

Author: hub-cap

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

@@ -567,7 +567,8 @@ private static Request prepareDeleteByQueryRequest(DeleteByQueryRequest deleteBy
             .withWaitForActiveShards(deleteByQueryRequest.getWaitForActiveShards())
             .withRequestsPerSecond(deleteByQueryRequest.getRequestsPerSecond())
             .withIndicesOptions(deleteByQueryRequest.indicesOptions())
-            .withWaitForCompletion(waitForCompletion);
+            .withWaitForCompletion(waitForCompletion)
+            .withSlices(deleteByQueryRequest.getSlices());
         if (deleteByQueryRequest.isAbortOnVersionConflict() == false) {
             params.putParam("conflicts", "proceed");
         }
@@ -595,7 +596,8 @@ static Request updateByQuery(UpdateByQueryRequest updateByQueryRequest) throws I
             .withTimeout(updateByQueryRequest.getTimeout())
             .withWaitForActiveShards(updateByQueryRequest.getWaitForActiveShards())
             .withRequestsPerSecond(updateByQueryRequest.getRequestsPerSecond())
-            .withIndicesOptions(updateByQueryRequest.indicesOptions());
+            .withIndicesOptions(updateByQueryRequest.indicesOptions())
+            .withSlices(updateByQueryRequest.getSlices());
         if (updateByQueryRequest.isAbortOnVersionConflict() == false) {
             params.putParam("conflicts", "proceed");
         }

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

@@ -459,6 +459,13 @@ public void testUpdateByQuery() throws IOException {
         if (randomBoolean()) {
             updateByQueryRequest.setScript(new Script("ctx._source.last = \"lastname\""));
         }
+        if (randomBoolean()) {
+            int slices = randomIntBetween(0, 4);
+            expectedParams.put("slices", Integer.toString(slices));
+            updateByQueryRequest.setSlices(slices);
+        } else {
+            expectedParams.put("slices", "1");
+        }
         setRandomIndicesOptions(updateByQueryRequest::setIndicesOptions, updateByQueryRequest::indicesOptions, expectedParams);
         setRandomTimeout(updateByQueryRequest::setTimeout, ReplicationRequest.DEFAULT_TIMEOUT, expectedParams);
         Request request = RequestConverters.updateByQuery(updateByQueryRequest);
@@ -508,6 +515,13 @@ public void testDeleteByQuery() throws IOException {
         } else {
             expectedParams.put("requests_per_second", "-1");
         }
+        if (randomBoolean()) {
+            int slices = randomIntBetween(0, 4);
+            expectedParams.put("slices", Integer.toString(slices));
+            deleteByQueryRequest.setSlices(slices);
+        } else {
+            expectedParams.put("slices", "1");
+        }
         setRandomIndicesOptions(deleteByQueryRequest::setIndicesOptions, deleteByQueryRequest::indicesOptions, expectedParams);
         setRandomTimeout(deleteByQueryRequest::setTimeout, ReplicationRequest.DEFAULT_TIMEOUT, expectedParams);
         expectedParams.put("wait_for_completion", Boolean.TRUE.toString());