Cryo tube gib and output fixes

[SECBATON-GRIFFON]

[consistency][oversight][bugfix]

What this does

Closes #35533.
Closes #29422.
Closes #16951.

also makes the results from the gib show up and float in the cryomix and allows them to be retrieved in ejection. note that dropping from mobs is still the only way they can show up inside a cryotube at all.
creates code for the floating animation to be reused inside any atom with "submerging" set to 1, currently still only applies for cryotubes.
makes the mob a vis_contents inside of it to properly show the gib animation and etc.

Why it's good

stops these items (or slime puddles) from being lost.

Changelog

🆑

• bugfix: Contents from a gibbed mob now show up nicer in cryo tube examining.
• bugfix: Cryo tubes now output at multitool direction as normal.
• tweak: Cryo tubes now use more comprehensive output checks for their exit, taking turf and object density into account.
• tweak: Dropped limbs no longer spread away from a mob in cryo.
• tweak: Gibs no longer spawn for gibbed mobs in cryo, only showing up on ejection.
• tweak: Dropped items from gibbing now show up in cryo tubes and can be retrieved.
• bugfix: As a result, this also includes slime puddles.

[jwhitak]

So, I finally got around to properly reviewing this since it's more of a feature addition than a bugfix (probation.jpg).

My initial thoughts are that when gibbing something inside of the cryo tube, the stuff still goes flying outside the tube.

I thought this right leg was outside the tube as well somehow... well, turns out, it wasn't outside the tube, though it appeared to be due to the strange displacement. It also wasn't moving using the submerged system, so it looked like it was on the back wall somehow. Probably just submerge_anim not being called on them. Note that it's normal for these objects to show up on the right click menu.

Blowing up another person in cryo shows off more of the oddities. This gibbing stuff is pretty much not that great.

I'm also concerned about the odd way submerging is handled regarding entering a submerging loc, since you still have to manually call the submerging animation proc to even start the process. It's yet another variable added to every single atom in the game where it's only used in cryo, so this can probably be implemented in a better way.

[SECBATON-GRIFFON]

Blowing up another person in cryo shows off more of the oddities. This gibbing stuff is pretty much not that great.

stopped the limbs and gibs from being ejected from the tube.