Move 'map attributes' into 'layouts'

data/maps/ShoalCave_LowTideLowerRoom/border.bin

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data/maps/ShoalCave_LowTideLowerRoom/header.inc

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 ShoalCave_LowTideLowerRoom: @ 848441C
-	.4byte ShoalCave_LowTideLowerRoom_MapAttributes
+	.4byte ShoalCave_LowTideLowerRoom_Layout
 	.4byte ShoalCave_LowTideLowerRoom_MapEvents
 	.4byte ShoalCave_LowTideLowerRoom_MapScripts
 	.4byte 0x0

data/maps/ShoalCave_LowTideLowerRoom/map.bin

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