Terrain base map shader fails to compile with "undeclared identifier 'SHADERGRAPH_MAIN_LIGHT_DIRECTION'" when using a Main Light Direction node in an HDRP TerrainLit shader graph

How to reproduce:

1. Create a new project using the "High Definition 3D" template
2. In the Project window, right-click and select "Create" > "Shader Graph" > "HDRP" > "Lit Shader Graph"
3. Open the created Shader Graph asset
4. In the Graph Inspector, open the "Graph Settings" tab and set "Material" to "TerrainLit"
5. Add a "Main Light Direction" node and connect its output to "Base Color" in the Fragment context
6. In the Shader Graph toolbar, select "Save Asset"
7. In the Project window, expand the Shader Graph asset and select the "Hidden/_BaseMapGen" sub-asset
8. Observe the Inspector

Actual result: The Inspector reports "undeclared identifier 'SHADERGRAPH_MAIN_LIGHT_DIRECTION'" once per generated pass, while the main shader from the same graph compiles
Expected result: The base map shader compiles without errors, the same as the main shader from the same graph

Reproducible with: 6000.3.0a5, 6000.3.23f1, 6000.5.11f1, 6000.6.0f1, 6000.7.0a6, 7000.0.0a1
Could not test with: 6000.0.0f1, 6000.0.83f1 (the TerrainLit Shader Graph target does not exist in 6000.0)

Reproducible on: Windows 11
Not reproducible on: No other environments tested