revert 0 buildvolume edgedisallowedsize for one_at_a_time

Turns out that the artificial disallowed area around the inside of the
build volume was necessary to take the brim into account when deciding
whether a model was outside the buildvolume.
The issue for which I removed this in the first place seems not to be
an issue anymore due to other commits

Reverts and e5fb9fb8 and e5c9bca
CURA-6522

cura/BuildVolume.py

@@ -1102,7 +1102,7 @@ class BuildVolume(SceneNode):
 
         # If we are printing one at a time, we need to add the bed adhesion size to the disallowed areas of the objects
         if container_stack.getProperty("print_sequence", "value") == "one_at_a_time":
-            return 0
+            return 0.1
 
         bed_adhesion_size = self._calculateBedAdhesionSize(used_extruders)
         support_expansion = self._calculateSupportExpansion(self._global_container_stack)

tests/TestBuildVolume.py

@@ -386,5 +386,5 @@ class TestGetEdgeDisallowedSize:
         build_volume._global_container_stack = self.createMockedStack()
         with patch("cura.Settings.ExtruderManager.ExtruderManager.getInstance"):
             with patch.dict(self.setting_property_dict, {"print_sequence": {"value": "one_at_a_time"}}):
-                assert build_volume.getEdgeDisallowedSize() == 0.0
+                assert build_volume.getEdgeDisallowedSize() == 0.1