_mvt endpoint does not include cross cluster prefix with `_index` value. For example, `_index` returns `myIndexPattern` instead of expected `cluster_one:myIndexPattern`. _search endpoint includes cross cluster prefix with `_index` value. This is causing problems in [Kibana maps tooltips](https://github.com/elastic/kibana/issues/153210)
x-pack/plugin/vector-tile/src/main/java/org/elasticsearch/xpack/vectortile/rest/RestVectorTileAction.java
.stream()
                                .filter(a -> GRID_FIELD.equals(a.getName()) == false && BOUNDS_FIELD.equals(a.getName()) == false)
                                .collect(Collectors.toList())
                        );
                    final SearchResponse meta = new SearchResponse(
                        new SearchResponseSections(
                            new SearchHits(
                                SearchHits.EMPTY,
                                searchResponse.getHits().getTotalHits(),
                                searchResponse.getHits().getMaxScore()
                            ), 
                            aggsWithoutGridAndBounds,
                            searchResponse.getSuggest(),
                            searchResponse.isTimedOut(),
                            searchResponse.isTerminatedEarly(),
                            searchResponse.getProfileResults() == null
                                ? null
                                : new SearchProfileResults(searchResponse.getProfileResults()),
                            searchResponse.getNumReducePhases()
                        ),
                        searchResponse.getScrollId(),
                        searchResponse.getTotalShards(),
                        searchResponse.getSuccessfulShards(),
                        searchResponse.getSkippedShards(),
                        searchResponse.getTook().millis(),
                        searchResponse.getShardFailures(),
                        searchResponse.getClusters()
                    );
                    tileBuilder.addLayers(buildMetaLayer(meta, bounds, request, featureFactory));
                    ensureOpen();