Add compile options to a few extensions (#8252)

* add compile options to a few extensions

* move dep to dev dep

* fix return types

extensions/agent/src/test/agentServiceTests/agentEnums.test.ts

@@ -2,7 +2,6 @@
  *  Copyright (c) Microsoft Corporation. All rights reserved.
  *  Licensed under the Source EULA. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
-'use strict';
 
 import 'mocha';
 import * as should from 'should';