Revert "adjust vitest ambient declaration file according to vitest docs (#612)"

[vorant94]

What:

temp fix for #629 until I understand how to do a permanent one

Why:

currently types are broken

How:

by reverting #612 changes

Checklist:

• [x] Documentation
• [x] Tests
• [x] Updated Type Definitions
• [x] Ready to be merged

[github-actions[bot]]

:tada: This issue has been resolved in version 6.6.2 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: