Various build and developer fixes, some optimizations (#2975)

* Various build and developer fixes, some optimizations

* Fix the linux build

* Fix afterpack

* Fix notarization variables

* Revert macos-notification-state changes from this PR

* Only build the tar for PRs

* Also ci

* Fix copy script

* Fix copy script more

* Remove @babel/cli

* Fix windows build

* Fix MAS build

webpack.config.preload.js

@@ -0,0 +1,28 @@
+// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+// Copyright (c) 2015-2016 Yuya Ochiai
+
+// This files uses CommonJS.
+/* eslint-disable import/no-commonjs */
+'use strict';
+
+const {merge} = require('webpack-merge');
+
+const base = require('./webpack.config.base');
+
+module.exports = merge(base, {
+    entry: {
+        internalAPI: './src/main/preload/internalAPI.js',
+        externalAPI: './src/main/preload/externalAPI.ts',
+    },
+    externalsPresets: {
+        electronPreload: true,
+    },
+    node: {
+        __filename: true,
+        __dirname: true,
+    },
+    target: 'electron-preload',
+});
+
+/* eslint-enable import/no-commonjs */