`@vitest/pretty-format` is not compatible with React 19 snapshots

[hi-ogawa]

Describe the bug

Since v2.0.2 and this PR #6077, Vitest uses @vitest/pretty-format which bundles react-is from React 18, but this doesn't support formatting React 19's element.

Previously it was possible to overrides react-is to pin React 19 version like other React deps react, react-dom, and react-server-dom-webpack and it's common to do so.

Not sure what would be the solution. We can try bundling react-is both from 18 and 19 and switch during runtime?

Reproduction

I found the issue on my repo hi-ogawa/vite-plugins#660, which is using pnpm override like this https://github.com/hi-ogawa/vite-plugins/blob/ca3f97ec09c2549d98779acbf9a24e97706c125d/package.json#L43-L46

Stackblitz repro

On latest Vitest https://stackblitz.com/edit/vitest-dev-vitest-a6zqtz?file=test%2Frepro.test.tsx

// repro.test.tsx
import { expect, test } from 'vitest';

test('repro', () => {
  expect(<div>hello</div>).toMatchInlineSnapshot(`
    {
      "$$typeof": Symbol(react.transitional.element),
      "_owner": null,
      "_store": {},
      "key": null,
      "props": {
        "children": "hello",
      },
      "type": "div",
    }
  `);
});

On Vitest v2.0.1 https://stackblitz.com/edit/vitest-dev-vitest-rrglpy?file=test%2Frepro.test.tsx

test('repro', () => {
  expect(<div>hello</div>).toMatchInlineSnapshot(`
    <div>
      hello
    </div>
  `);
});

System Info

(stackblitz)

  System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 18.20.3 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.2.3 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    vitest: 2.1.5 => 2.1.5

Used Package Manager

npm

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