### 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)
create_vertex_array_from_triangle_arrays(arr, *r_vertex, &lformat);
	ERR_FAIL_COND(r_vertex->size() == 0);
	
	r_index->clear();
	Vector<int> idx = arr[RS::ARRAY_INDEX];
	int is = idx.size();
	if (is) {
		lformat |= RS::ARRAY_FORMAT_INDEX;
		const int *iarr = idx.ptr();
		for (int i = 0; i < is; i++) {
			r_index->push_back(iarr[i]);
		}
	}
}
void SurfaceTool::create_from_triangle_arrays(const Array &p_arrays) {
	clear();
	primitive = Mesh::PRIMITIVE_TRIANGLES;
	_create_list_from_arrays(p_arrays, &vertex_array, &index_array, format);
	for (int j = 0; j < RS::ARRAY_CUSTOM_COUNT; j++) {
		if (format & custom_mask[j]) {
			last_custom_format[j] = (CustomFormat)((format >> custom_shift[j]) & RS::ARRAY_FORMAT_CUSTOM_MASK);
		}
	}
}
void SurfaceTool::create_from(const Ref<Mesh> &p_existing, int p_surface) {