Crawling Fixes 1: Dragons and Borgs can't do the worm. (#39084)

* Init Commit

* Remove unused code, fix stun visuals bug

* Update Content.Shared/Stunnable/SharedStunSystem.cs

* Some initial changes

* first batch of changes

* Commit

* One line cleanup

* KnockdownStatusEffect ain't worth it.

* Fix 2 bugs

* Fixes

* Remove that actually,

* Commit

* Better solution

* Alright final commit I think

* Add better remarks

* How the fuck did this not get pushed???

* Wait no why was my ryder trying to push that??? I didn't make that change! DON'T DO THAT!!!

* Review

* Don't log that

---------

Co-authored-by: Princess Cheeseballs <66055347+Pronana@users.noreply.github.com>
Co-authored-by: ScarKy0 <106310278+ScarKy0@users.noreply.github.com>

Content.Shared/Slippery/SlipperySystem.cs

@@ -149,7 +149,8 @@ public sealed class SlipperySystem : EntitySystem
             _audio.PlayPredicted(component.SlipSound, other, other);
         }
 
-        _stun.TryKnockdown(other, component.SlipData.KnockdownTime, true, force: true);
+        // Slippery is so tied to knockdown that we really just need to force it here.
+        _stun.TryKnockdown(other, component.SlipData.KnockdownTime, force: true);
 
         _adminLogger.Add(LogType.Slip, LogImpact.Low, $"{ToPrettyString(other):mob} slipped on collision with {ToPrettyString(uid):entity}");
     }