### 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)
ret.clear();
	Vector<Vector3> varr = p_arrays[RS::ARRAY_VERTEX];
	Vector<Vector3> narr = p_arrays[RS::ARRAY_NORMAL];
	Vector<float> tarr = p_arrays[RS::ARRAY_TANGENT];
	Vector<Color> carr = p_arrays[RS::ARRAY_COLOR];
	Vector<Vector2> uvarr = p_arrays[RS::ARRAY_TEX_UV];
	Vector<Vector2> uv2arr = p_arrays[RS::ARRAY_TEX_UV2];
	Vector<int> barr = p_arrays[RS::ARRAY_BONES];
	Vector<float> warr = p_arrays[RS::ARRAY_WEIGHTS];
	Vector<float> custom_float[RS::ARRAY_CUSTOM_COUNT];
	int vc = varr.size();
	if (vc == 0) {
		if (r_format) {
			*r_format = 0;
		}
		return;
	}
	int lformat = 0;
	if (varr.size()) {
		lformat |= RS::ARRAY_FORMAT_VERTEX;
	}
	if (narr.size()) {
		lformat |= RS::ARRAY_FORMAT_NORMAL;
	}
	if (tarr.size()) {
		lformat |= RS::ARRAY_FORMAT_TANGENT;
	}
	if (carr.size()) {