Fix Raise3D Pro3/Pro3 Plus printable_area (single vs dual extruder) (#15243)

Fix incorrect printable_area for Raise3D Pro3 and Pro3 Plus profiles

All Raise3D Pro3/Pro3 Plus machine profiles (Left, Right, Dual) shared
the same 340x300 printable_area regardless of single vs dual extruder
use. This overstated single-extruder X travel by 40mm and failed to
shrink the Dual profile to the real nozzle-overlap zone.

Corrected to Raise3D's published build volume specs:
- Single extruder (Left/Right): 300 x 300 mm
- Dual extruder: 255 x 300 mm

printable_height (300 for Pro3, 605 for Pro3 Plus) and origin (0,0)
are unchanged; both were already correct.

Source: https://www.raise3d.com/pro3-series/

Co-authored-by: Jon Ashton <ashtonj@zentechman.com>
Co-authored-by: SoftFever <103989404+SoftFever@users.noreply.github.com>

resources/profiles/Raise3D/machine/Raise3D Pro3 0.4 nozzle (Dual).json

@@ -21,8 +21,8 @@
 	],
 	"printable_area": [
 		"0x0",
-		"340x0",
-		"340x300",
+		"255x0",
+		"255x300",
 		"0x300"
 	],
 	"printable_height": "300",

resources/profiles/Raise3D/machine/Raise3D Pro3 0.4 nozzle (Left).json

@@ -21,8 +21,8 @@
 	],
 	"printable_area": [
 		"0x0",
-		"340x0",
-		"340x300",
+		"300x0",
+		"300x300",
 		"0x300"
 	],
 	"printable_height": "300",

resources/profiles/Raise3D/machine/Raise3D Pro3 0.4 nozzle (Right).json

@@ -21,8 +21,8 @@
 	],
 	"printable_area": [
 		"0x0",
-		"340x0",
-		"340x300",
+		"300x0",
+		"300x300",
 		"0x300"
 	],
 	"printable_height": "300",

resources/profiles/Raise3D/machine/Raise3D Pro3 Plus 0.4 nozzle (Dual).json

@@ -21,8 +21,8 @@
 	],
 	"printable_area": [
 		"0x0",
-		"340x0",
-		"340x300",
+		"255x0",
+		"255x300",
 		"0x300"
 	],
 	"printable_height": "605",

resources/profiles/Raise3D/machine/Raise3D Pro3 Plus 0.4 nozzle (Left).json

@@ -21,8 +21,8 @@
 	],
 	"printable_area": [
 		"0x0",
-		"340x0",
-		"340x300",
+		"300x0",
+		"300x300",
 		"0x300"
 	],
 	"printable_height": "605",

resources/profiles/Raise3D/machine/Raise3D Pro3 Plus 0.4 nozzle (Right).json

@@ -21,8 +21,8 @@
 	],
 	"printable_area": [
 		"0x0",
-		"340x0",
-		"340x300",
+		"300x0",
+		"300x300",
 		"0x300"
 	],
 	"printable_height": "605",