Regression: Can no longer exclude folder from workspace

[ottomated]

Describe the bug

My workspace looks like this:

import { defineWorkspace } from 'vitest/config';

export default defineWorkspace([
  'sites/*',
  'packages/*',
  '!packages/tests',
  'apps/*',
]);

As of 2.1.1, it throws this error: Error: Workspace config file "vitest.workspace.ts" references a non-existing file or a directory: .../!packages/tests

Reproduction

should not need reproduction

System Info

System:
    OS: Linux 6.9 Fedora Linux 40 (Forty)
    CPU: (24) x64 AMD Ryzen 9 7900 12-Core Processor
    Memory: 23.57 GB / 30.49 GB
    Container: Yes
    Shell: 3.7.0 - /bin/fish
  Binaries:
    Node: 20.17.0 - ~/.volta/tools/image/node/20.17.0/bin/node
    Yarn: 4.1.1 - ~/.volta/tools/image/yarn/4.1.1/bin/yarn
    npm: 10.8.2 - ~/.volta/tools/image/node/20.17.0/bin/npm
    pnpm: 9.10.0 - ~/.volta/bin/pnpm
    bun: 1.1.26 - ~/.bun/bin/bun
  Browsers:
    Chrome: 128.0.6613.119
  npmPackages:
    vitest: ^2.1.1 => 2.1.1

Used Package Manager

pnpm

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