[XR] Port XR's physics support to Physics architecture v2

[RaananW]

The physics module of WebXR currently uses V1. A new version of the feature should be implemented, supporting v2 and Havok.

[yuripourre]

Up! 🥹

[github-actions]

This issue has been automatically staled because it has been inactive for more than 14 days. Please update to "unstale".

[yuripourre]

Oh no!!

[RaananW]

Not to worry, this will be tackled on the next major for sure.

[yuripourre]

@RaananW phew, thanks for the reply!

I know this issue would be very hard to complete but this is the only reason I am using ammo instead of Havok.

I am looking forward to it!