[Open Assets] DANTDM's LAB!!!!! V1.3

In this new update you can now visit Fake DanTDM's Lab from episode 8!
Shoutout to MRcharlex for the tutorial on how to actually build it. this version also fixes a few issues and adds a little something into the Test Chamber from that episode

The fake lab can be found to the right of the actual Lab.

Fixes the lake at the back of the lab breaking the sky,
fixed softlock and stuff