Refactor geometry node groups for image depth processing

- Introduced new utility functions in common nodes for evaluating fields and capturing attributes.
- Simplified volume field calculations in image depth cutout and panorama groups by utilizing new utility functions.
- Enhanced readability and maintainability of the image depth cutout and panorama node groups by removing redundant code and improving function usage.
- Adjusted default values for thickness and depth scale in image relief plane group for better user experience.
- Improved handling of geometry attributes and connections in image depth plane group to streamline processing.

tests/tools/nodes/test_inventory.py

@@ -15,6 +15,8 @@ def test_saved_asset_inventory():
         assert node_group.use_fake_user and node_group.users > 0
         if name in GEOMETRY_NAMES:
             assert node_group.is_modifier
+            stores = [node for node in node_group.nodes if node.bl_idname == "GeometryNodeStoreNamedAttribute"]
+            assert all(node.inputs["Name"].default_value in {"UVMap", "o_normal_scale"} for node in stores), name
         if bpy.app.version >= (5, 0, 0):
             assert node_group.library is not None
         if name in {"O Image Depth Layer", "O Shadeless"}: