### 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)
ERR_FAIL_COND(!begun);
	ERR_FAIL_COND(!first && !(format & Mesh::ARRAY_FORMAT_BONES));
	format |= Mesh::ARRAY_FORMAT_BONES;
	if (skin_weights == SKIN_8_WEIGHTS) {
		format |= Mesh::ARRAY_FLAG_USE_8_BONE_WEIGHTS;
	}
	last_bones = p_bones;
}
void SurfaceTool::set_weights(const Vector<float> &p_weights) {
	ERR_FAIL_COND(!begun);
	ERR_FAIL_COND(!first && !(format & Mesh::ARRAY_FORMAT_WEIGHTS));
	format |= Mesh::ARRAY_FORMAT_WEIGHTS;
	if (skin_weights == SKIN_8_WEIGHTS) {
		format |= Mesh::ARRAY_FLAG_USE_8_BONE_WEIGHTS;
	}
	last_weights = p_weights;
}
void SurfaceTool::set_smooth_group(uint32_t p_group) {
	last_smooth_group = p_group;
}
void SurfaceTool::_add_triangle_fan(const Vector<Vector3> &p_vertices, const Vector<Vector2> &p_uvs, const Vector<Color> &p_colors, const Vector<Vector2> &p_uv2s, const Vector<Vector3> &p_normals, const TypedArray<Plane> &p_tangents) {