fix: Streamlines gump compilation (#969)

Changes gump compilation to use string interpolation. .NET 6 uses code generation and compile time tricks to speed up string interpolation between 15 and 30% and reduce allocations dramatically.

Projects/UOContent/Gumps/BaseImageTileButtonsGump.cs

@@ -109,9 +109,9 @@ namespace Server.Gumps
                     b.ItemID,
                     b.Hue,
                     15,
-                    10,
-                    b.LocalizedTooltip
+                    10
                 );
+                AddTooltip(b.LocalizedTooltip);
                 TextDefinition.AddHtmlText(this, innerX + 84, innerY, 250, 60, b.Label, false, false, 0x7FFF, 0xFFFFFF);
             }
         }

Projects/UOContent/Spells/Ninjitsu/AnimalForm.cs

@@ -462,9 +462,9 @@ namespace Server.Spells.Ninjitsu
                         entries[i].ItemID,
                         entries[i].Hue,
                         40 - b.Width / 2 - b.X,
-                        30 - b.Height / 2 - b.Y,
-                        entries[i].Tooltip
+                        30 - b.Height / 2 - b.Y
                     );
+                    AddTooltip(entries[i].Tooltip);
                     AddHtmlLocalized(x + 84, y, 250, 60, entries[i].Name, 0x7FFF);
 
                     current++;