### Godot version

4.1 RC3

### System information

Windows 11 AMD Ryzen 5950x

### Issue description

Actually should be pretty simple, as of commit: https://github.com/godotengine/godot/commit/1c93606e470f0cad5f14af104ccb89a95a89931c

SurfaceTool's add_triangle_fan() maps its parameters like so:
`add_triangle_fan(p_vertices, p_uv2s, p_colors, p_uv2s, p_normals, Variant(p_tangents));`

As you can see its using **p_uv2s** as the 2nd _and_ 4th parameters, and isn't using **p_uvs** at all which ought to be the 2nd parameter. The 2nd parameter at the moment does nothing at all.

As a result I had to change my code from:
`surface_tool.add_triangle_fan(vertices, [uvs[0], uvs[1], uvs[2], uvs[1], uvs[3], uvs[2]])`
To:
`surface_tool.add_triangle_fan(vertices, [], [], [uvs[0], uvs[1], uvs[2], uvs[1], uvs[3], uvs[2]])`

### Steps to reproduce

Use add_triangle_fan and place your UVs as the 2nd parameter, your mesh will be black. When you change your uvs to the 4th parameter, it correctly maps.

### Minimal reproduction project

Should be trivial to reproduce (and to see why it's broken in this commit)
ws.index = vtx.bones[i];
				ws.weight = vtx.weights[i];
				weights.push_back(ws);
			}
			
			weights.sort();
			
			weights.resize(expected_vertices);
			
			float total = 0.0;
			for (int i = 0; i < expected_vertices; i++) {
				total += weights[i].weight;
			}
			vtx.weights.resize(expected_vertices);
			vtx.bones.resize(expected_vertices);
			for (int i = 0; i < expected_vertices; i++) {
				if (total > 0) {
					vtx.weights.write[i] = weights[i].weight / total;
				} else {
					vtx.weights.write[i] = 0;
				}
				vtx.bones.write[i] = weights[i].index;
			}
		}
	}
	vertex_array.push_back(vtx);
	first = false;
	format |= Mesh::ARRAY_FORMAT_VERTEX;
}
void SurfaceTool::set_color(Color p_color) {