Bump vitest from 3.2.4 to 4.0.4 (#3695)

* Bump vitest from 3.2.4 to 4.0.4
* Bump @vitest/coverage-v8 from 3.2.4 to 4.0.4
* Bump jsdom from 27.0.0 to 27.0.1

Bumps [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) from 3.2.4 to 4.0.4.
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.0.4/packages/vitest)

---
updated-dependencies:
- dependency-name: vitest
  dependency-version: 4.0.4
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* Adjusting for vitest compatibility differences between v3 and v4
* fixing lint errors

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Alex Cottner <acottner@mozilla.com>

Author: dependabot[bot]