Vents new terrain 2.0

[Patryk26g]

Brief Description of What This PR Does

• Changes vents terrain generation - now vent-like shapes appear in the vents. The chunks don't have collision shapes, instead one big sphere collision shape appears in the middle instead. Thanks to that the number of collision checks is significantly reduced and microbes won't get stuch on the terrain, they will just slide off,
• Increases grid cell size a little bit,
• Reduces number of grid cells
• Changes spawning logic
• When terrains overlaps the new chunk now slides off instead of picking random direction to spawn in
• Lowers and increases the background plane a bit, so that chunks can spawn a bit more under the microbe plane

Rework of #6591

Progress Checklist

Note: before starting this checklist the PR should be marked as non-draft.

• PR author has checked that this PR works as intended and doesn't
  break existing features:
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  (this is important as to not waste the time of Thrive team
  members reviewing this PR). This includes gameplay testing by the PR author.
• Initial code review passed (this and further items should not be checked by the PR author)
• Functionality is confirmed working by another person (see above checklist link)
• Final code review is passed and code conforms to the
  styleguide.

Before merging all CI jobs should finish on this PR without errors, if
there are automatically detected style issues they should be fixed by
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[hhyyrylainen]

What's the status on this V2 of this change?

[hhyyrylainen]

I think these changes in this file should be reverted.

[Patryk26g]

Oh sorry, I missed that!

[hhyyrylainen]

It seems like nothing is ever put in this spatial? So I think it should be excluded from this entity type.

[hhyyrylainen]

Suggested change

	public static void SpawnCollisionWithoutFinalizing(CommandBuffer entityRecorder,
	public static void SpawnTerrainCollisionWithoutFinalizing(CommandBuffer entityRecorder,

[Patryk26g]

What's the status on this V2 of this change?

Well, it's ready for review - the v2 is from the fact that some month ago I tried to add these vents in a very flawed way and this is the improved version. I will provide the fixes to the issues you pointed when I have time

[hhyyrylainen]

Hang on, I just realized something, won't this break on save load? Because PhysicsShape cannot be serialized into a save, so this actually must use a component type that can reload the collision upon loading the save; This shape setting only works in a single play session and is not restored automatically upon loading a save.