[Vega] Add Filter custom label for opensearchDashboardsAddFilter (#3640)

* [Vega] Add Filter custom label for opensearchDashboardsAddFilter

Signed-off-by: Aswath <it.aswath@gmail.com>

Co-authored-by: Josh Romero <rmerqg@amazon.com>

---------

Signed-off-by: Aswath <it.aswath@gmail.com>
Co-authored-by: Josh Romero <rmerqg@amazon.com>
(cherry picked from commit 276fae9)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

src/plugins/vis_type_vega/public/vega_view/vega_base_view.js

@@ -315,10 +315,15 @@ export class VegaBaseView {
   /**
    * @param {object} query Query DSL snippet, as used in the query DSL editor
    * @param {string} [index] as defined in OpenSearch Dashboards, or default if missing
+   * @param {string} alias OpenSearch Query DSL's custom label for `opensearchDashboardsAddFilter`, as used in '+ Add Filter'
    */
-  async addFilterHandler(query, index) {
+  async addFilterHandler(query, index, alias) {
     const indexId = await this.findIndex(Utils.handleNonStringIndex(index));
-    const filter = opensearchFilters.buildQueryFilter(Utils.handleInvalidQuery(query), indexId);
+    const filter = opensearchFilters.buildQueryFilter(
+      Utils.handleInvalidQuery(query),
+      indexId,
+      alias
+    );
     this._applyFilter({ filters: [filter] });
   }