Support spaces for workspaceFolder on Windows

[apupier]

in .vscode-test.mjs file, if I proivide something like:

import { defineConfig } from '@vscode/test-cli';

export default defineConfig({
	files: 'out/test/**/*.test.js',
	workspaceFolder: './with space',
	launchArgs: ['--verbose'],
	mocha: {
		ui: 'tdd',
		color: true,
		timeout: 100000,
		reporter: 'mocha-jenkins-reporter'
	}
});

on Windows, in the log I can see:

[main 2025-01-23T13:38:05.050Z] Starting VS Code
[main 2025-01-23T13:38:05.050Z] from: d:\a\vscode-kaoto\vscode-kaoto\.vscode-test\vscode-win32-x64-archive-1.96.4\resources\app
[main 2025-01-23T13:38:05.051Z] args: {
  _: [
    'D:\\a\\vscode-kaoto\\vscode-kaoto\\with',
    'D:\\a\\vscode-kaoto\\vscode-kaoto\\space'
  ],

on Linux, it is workign fine:

[main 2025-01-23T13:36:50.112Z] Starting VS Code
[main 2025-01-23T13:36:50.112Z] from: /home/runner/work/vscode-kaoto/vscode-kaoto/.vscode-test/vscode-linux-x64-1.96.4/resources/app
[main 2025-01-23T13:36:50.112Z] args: {
  _: [
    '/home/runner/work/vscode-kaoto/vscode-kaoto/with space'
  ],