Downgrade to query-string v5.1.1 (#59633)

* Downgrade to query-string v5.1.1

* update lib version for x-pack

* fix JEST

* fix functional tests

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

typings/query_string.d.ts

@@ -0,0 +1,46 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+declare module 'query-string' {
+  type ArrayFormat = 'bracket' | 'index' | 'none';
+
+  export interface ParseOptions {
+    arrayFormat?: ArrayFormat;
+    sort: ((itemLeft: string, itemRight: string) => number) | false;
+  }
+
+  export interface ParsedQuery<T = string> {
+    [key: string]: T | T[] | null | undefined;
+  }
+
+  export function parse(str: string, options?: ParseOptions): ParsedQuery;
+
+  export function parseUrl(str: string, options?: ParseOptions): { url: string; query: any };
+
+  export interface StringifyOptions {
+    strict?: boolean;
+    encode?: boolean;
+    arrayFormat?: ArrayFormat;
+    sort: ((itemLeft: string, itemRight: string) => number) | false;
+  }
+
+  export function stringify(obj: object, options?: StringifyOptions): string;
+
+  export function extract(str: string): string;
+}