Move 'map attributes' into 'layouts'

data/layouts/ScorchedSlab/border.bin

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+

data/layouts/ScorchedSlab/layout.inc

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+	.align 2
+ScorchedSlab_MapBorder::
+	.incbin "data/layouts/ScorchedSlab/border.bin"
+
+	.align 2
+ScorchedSlab_MapBlockdata::
+	.incbin "data/layouts/ScorchedSlab/map.bin"
+
+	.align 2
+ScorchedSlab_Layout::
+	.4byte 0xf
+	.4byte 0x14
+	.4byte ScorchedSlab_MapBorder
+	.4byte ScorchedSlab_MapBlockdata
+	.4byte gTileset_General
+	.4byte gTileset_Cave

data/layouts/ScorchedSlab/map.bin

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+
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