chore: bump supported `msw` version to `v2.3.0` (#66351)
### What?
This bumps the supported `msw` version when using the `playwright` test
mode. There's no need for mocking requests and responses anymore since
[they adopted](https://github.com/mswjs/msw/pull/1436) the global fetch
API in `msw`.
### Why?
Users can extend `test` from `playwright` manually and create the `msw`
fixtures, but it's better if it works out of the box with newer versions
of `msw`.
Fixes #63338.
Co-authored-by: Sam Ko <sam@vercel.com>
