* Update rimraf to version 4.1.2
* use rimraf sync API
Our `oxide` engine uses rimraf v4, our `stable` engine uses rimraf v3
and the API is different in both. However the tests are currently shared
for both engines so we have to use the correct API for the correct
version.
However, we can also just use the `sync` API.
More info: https://github.com/isaacs/rimraf#major-changes-from-v3-to-v4
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Co-authored-by: depfu[bot] <23717796+depfu[bot]@users.noreply.github.com>