UI: Merge Spin and spin duplicate tools

Both tools calls the same operator, only difference is "dupli" bool
property value. So expose the property in tool settings and remove the
spin duplicate tool

Resolves #98094

Pull Request: https://projects.blender.org/blender/blender/pulls/117880

scripts/startup/bl_ui/space_toolsystem_toolbar.py

@@ -803,6 +803,7 @@ class _defs_edit_mesh:
         def draw_settings(_context, layout, tool):
             props = tool.operator_properties("mesh.spin")
             layout.prop(props, "steps")
+            layout.prop(props, "dupli")
             props = tool.gizmo_group_properties("MESH_GGT_spin")
             layout.prop(props, "axis")
 
@@ -815,23 +816,6 @@ class _defs_edit_mesh:
             draw_settings=draw_settings,
         )
 
-    @ToolDef.from_fn
-    def spin_duplicate():
-        def draw_settings(_context, layout, tool):
-            props = tool.operator_properties("mesh.spin")
-            layout.prop(props, "steps")
-            props = tool.gizmo_group_properties("MESH_GGT_spin")
-            layout.prop(props, "axis")
-
-        return dict(
-            idname="builtin.spin_duplicates",
-            label="Spin Duplicates",
-            icon="ops.mesh.spin.duplicate",
-            widget="MESH_GGT_spin",
-            keymap=(),
-            draw_settings=draw_settings,
-        )
-
     @ToolDef.from_fn
     def inset():
         def draw_settings(_context, layout, tool):
@@ -2996,10 +2980,7 @@ class VIEW3D_PT_tools_active(ToolSelectPanelHelper, Panel):
                 _defs_edit_mesh.bisect,
             ),
             _defs_edit_mesh.poly_build,
-            (
-                _defs_edit_mesh.spin,
-                _defs_edit_mesh.spin_duplicate,
-            ),
+            _defs_edit_mesh.spin,
             (
                 _defs_edit_mesh.vertex_smooth,
                 _defs_edit_mesh.vertex_randomize,

source/blender/editors/datafiles/CMakeLists.txt

@@ -855,7 +855,6 @@ set_property(GLOBAL PROPERTY ICON_GEOM_NAMES
   ops.mesh.rip
   ops.mesh.rip_edge
   ops.mesh.spin
-  ops.mesh.spin.duplicate
   ops.mesh.vertices_smooth
   ops.node.links_cut
   ops.paint.eyedropper_add