PartDesign: Use true tool positions for boolean preview

This fixes positioning of some previews for booleans that were misplaced
after #24750 was merged. It restores previous code that was correct for
most cases. The reason for some previews being misaligned is described
in the #25578 - the preview actually shows how the result should be but
due to some shortcuts taken in code the result is incorrect.

src/Mod/PartDesign/App/FeatureBoolean.cpp

@@ -233,10 +233,9 @@ void Boolean::updatePreviewShape()
         std::vector<TopoShape> shapes;
 
         for (auto& obj : Group.getValues()) {
-            auto shape
-                = getTopoShape(obj, Part::ShapeOption::ResolveLink | Part::ShapeOption::Transform);
-            shape.setPlacement(shape.getPlacement().inverse() * globalPlacement());
-            shapes.push_back(shape);
+            shapes.push_back(
+                getTopoShape(obj, Part::ShapeOption::ResolveLink | Part::ShapeOption::Transform)
+            );
         }
 
         TopoShape result;

src/Mod/PartDesign/Gui/ViewProviderBoolean.cpp

@@ -168,7 +168,6 @@ void ViewProviderBoolean::updatePreview()
         }
 
         Part::TopoShape toolShape = feature->Shape.getShape();
-        toolShape.setPlacement(toolShape.getPlacement().inverse() * feature->globalPlacement());
 
         auto pcToolPreview = new PartGui::SoPreviewShape;
         updatePreviewShape(toolShape, pcToolPreview);