Move all E2E dependencies into its own folder, run from there (#3068)

* Move all E2E dependencies into its own folder, run from there

* Run flaky-tests from E2E folder

* This should work better

* Fix E2E test for Linux

* Fix for Windows, fix lint

e2e/babel.config.js

@@ -0,0 +1,11 @@
+// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+module.exports = (api) => {
+    api.cache.forever();
+    return {
+        presets: [
+            '@babel/typescript',
+        ],
+    };
+};