### 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)
int varr_len = vertex_array.size();
	Array a;
	a.resize(Mesh::ARRAY_MAX);
	for (int i = 0; i < Mesh::ARRAY_MAX; i++) {
		if (!(format & (1 << i))) {
			continue; 
		}
		switch (i) {
			case Mesh::ARRAY_VERTEX:
			case Mesh::ARRAY_NORMAL: {
				Vector<Vector3> array;
				array.resize(varr_len);
				Vector3 *w = array.ptrw();
				for (uint32_t idx = 0; idx < vertex_array.size(); idx++) {
					const Vertex &v = vertex_array[idx];
					switch (i) {
						case Mesh::ARRAY_VERTEX: {
							w[idx] = v.vertex;
						} break;
						case Mesh::ARRAY_NORMAL: {
							w[idx] = v.normal;
						} break;
					}
				}
				a[i] = array;
			} break;