Add ignoreUnavailable param to delete indices (#27215)

types/elasticsearch/elasticsearch-tests.ts

@@ -44,6 +44,13 @@ client.indices.delete({
 }, (error) => {
 });
 
+client.indices.delete({
+  index: 'test_index',
+  ignoreUnavailable: true
+}).then((body) => {
+}, (error) => {
+});
+
 client.deleteByQuery({
   index: 'test_index',
   type: 'test_type',

types/elasticsearch/index.d.ts

@@ -1143,6 +1143,7 @@ export interface IndicesDeleteParams extends GenericParams {
     timeout?: TimeSpan;
     masterTimeout?: TimeSpan;
     index: NameList;
+    ignoreUnavailable?: boolean;
 }
 
 export interface IndicesDeleteAliasParams extends GenericParams {