Merge from vscode merge-base (#22780)

* Revert "Revert "Merge from vscode merge-base (#22769)" (#22779)"

This reverts commit 47a1745180.

* Fix notebook download task

* Remove done call from extensions-ci

extensions/markdown-language-features/server/extension.webpack.config.js

@@ -0,0 +1,22 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+//@ts-check
+
+'use strict';
+
+const withDefaults = require('../../shared.webpack.config');
+const path = require('path');
+
+module.exports = withDefaults({
+	context: path.join(__dirname),
+	entry: {
+		extension: './src/node/main.ts',
+	},
+	output: {
+		filename: 'main.js',
+		path: path.join(__dirname, 'dist', 'node'),
+	}
+});