Fix holopads phasing through walls. (#34300)

* change holopad mask from subfloormask lowimpassable to tabletopmachinemask opaque

* change masks to prevent laser collisions

followed the artifact analyzer for this one. I don't quite understand how fixtures work so I'm a bit perplexed by this.

* Boolean I command you: LOWERCASE

Resources/Prototypes/Entities/Structures/Machines/holopad.yml

@@ -13,7 +13,15 @@
           !type:PhysShapeCircle
           radius: 0.25
         mask:
-        - SubfloorMask
+        - Impassable
+        - HighImpassable
+        - MidImpassable
+      fix2:
+        shape:
+          !type:PhysShapeCircle
+          radius: 0.25
+        mask:
+        - MachineLayer
         layer:
         - LowImpassable
         hard: false