Add "distance spacing" multiplier for osu! ruleset

While osu!catch also implements a distance snap grid, it doesn't rely on
`GetBeatSnapDistanceAt` (unlike osu!), therefore it can't have the
"distance spacing" multiplier yet.

osu.Game.Rulesets.Catch/Edit/CatchHitObjectComposer.cs

@@ -32,6 +32,8 @@ namespace osu.Game.Rulesets.Catch.Edit
 
         private readonly Bindable<TernaryState> distanceSnapToggle = new Bindable<TernaryState>();
 
+        protected override bool SupportsDistanceSpacing => false;
+
         private InputManager inputManager;
 
         public CatchHitObjectComposer(CatchRuleset ruleset)