Currents overhaul

[dligr]

Brief Description of What This PR Does

• Makes currents' noise textures 2D instead of 3D for less repetition.
• Current shifting is now done by moving two noise textures and multiplying them with eachother
• Somewhat improves noise textures to make them more interesting (like currents going on for longer and having some whirlpool-like areas)
• Enables trails (for surface patches mostly), also colors some currents

Related Issues

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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:
  https://wiki.revolutionarygamesstudio.com/wiki/Testing_Checklist
  (this is important as to not waste the time of Thrive team
  members reviewing this PR)
• 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.

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[revolutionary-bot]

We are currently in feature freeze until the next release.
If your PR is not just a simple fix, then it may take until the release to get reviewed and merged.

[Patryk26g]

I checked the look of it and I think it looks really nice, but when I go faster with my cell to new areas, the currents are not present there and only appear after a second o two. is it possible for them to cover a bigger area so that they are visible wherever player goes?

[dligr]

So, I increased the extents of the particle spawn area by 1.5 and I think that this fixes the problem. Unfortunately, increasing the box extents also requires increasing particle count, so if the issue persists in some way, the solution might be to move the box slightly in front of the player to let particles spawn in advance.

[hhyyrylainen]

The code looks good now. I tested in game and I think the trails are probably a good improvement but I don't recall anyone saying anything about the trail visuals yet. Patches with no visual changes also seemed good to me.