### Godot version

4.0.dev (ba9491f87)

### System information

Windows 11 Chrome 109.0.5414.75 (Official Build), iOS 16.2 Safari

### Issue description

When exporting a simple project for Web with any GDScript like following:
```gdscript
extends Control

```
will print the following error to the console:
```
USER ERROR: U_ILLEGAL_ARGUMENT_ERROR
   at: _is_confusable (modules\text_server_adv\text_server_adv.cpp:6151)
```

![image](https://user-images.githubusercontent.com/173001/214089154-d88f3f44-b670-41ec-9743-30627677968e.png)

For more complex project, following additional errors are showing:
```
USER ERROR: U_FILE_ACCESS_ERROR
   at: _spoof_check (modules\text_server_adv\text_server_adv.cpp:6174)
USER ERROR: U_ILLEGAL_ARGUMENT_ERROR
   at: _is_confusable (modules\text_server_adv\text_server_adv.cpp:6151)
```
When I've inserted `print_line(p_string)` at text_server_adv.cpp line 6172, following logs are collected:
![image](https://user-images.githubusercontent.com/173001/214091164-cb5af630-56d2-446e-b1c4-dc20066565d5.png)

It seems that the identifiers of *.gd files are printed to the console.


### Steps to reproduce

1. Open minimal reproduction project.
2. Exports to Web.
3. Open exported site with Chrome and open developer console.
4. Following error logs will be seen (reproduced): `USER ERROR: U_ILLEGAL_ARGUMENT_ERROR`

### Minimal reproduction project

[text_server_adv_error.zip](https://github.com/godotengine/godot/files/10481582/text_server_adv_error.zip)

}
	if (!f.is_valid()) {
		
		for (int i = p_start; i < p_end; i++) {
			if (p_sd->preserve_invalid || (p_sd->preserve_control && is_control(p_sd->text[i]))) {
				Glyph gl;
				gl.start = i + p_sd->start;
				gl.end = i + 1 + p_sd->start;
				gl.count = 1;
				gl.index = p_sd->text[i];
				gl.font_size = fs;
				gl.font_rid = RID();
				if (p_direction == HB_DIRECTION_RTL || p_direction == HB_DIRECTION_BTT) {
					gl.flags |= TextServer::GRAPHEME_IS_RTL;
				}
				if (p_sd->orientation == ORIENTATION_HORIZONTAL) {
					gl.advance = get_hex_code_box_size(fs, gl.index).x;
					p_sd->ascent = MAX(p_sd->ascent, get_hex_code_box_size(fs, gl.index).y);
				} else {
					gl.advance = get_hex_code_box_size(fs, gl.index).y;
					gl.y_off = get_hex_code_box_size(fs, gl.index).y;
					gl.x_off = -Math::round(get_hex_code_box_size(fs, gl.index).x * 0.5);
					p_sd->ascent = MAX(p_sd->ascent, Math::round(get_hex_code_box_size(fs, gl.index).x * 0.5));
					p_sd->descent = MAX(p_sd->descent, Math::round(get_hex_code_box_size(fs, gl.index).x * 0.5));
				}
				p_sd->width += gl.advance;
				p_sd->glyphs.push_back(gl);
			}
		}
		return;