Support embree 4.4

[lahwaacz]

Arch Linux has currently embree 4.4, but TTK requires embree version 3. Can you add support for the current embree version?

[julien-tierny]

hi @lahwaacz
thanks for your issue.
just a quick remark: embree is an optional dependency (it is not required to build TTK, you'll just miss some features related to geometry approximation).
@JonasLukasczyk how about an update to embree 4.4?