### 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)

for (int i = 0; i < normalized_string.length(); i++) {
		if (u_getCombiningClass(normalized_string[i]
#ifdef GDEXTENSION
			result zed_string[i]);
#else
			result = result + normalized_string[i];
#endif
		}
	}
	return result;
}
String TextServerAdvanced::_string_to_upper(const String &p_string, const String &p_language) const {
	if (p_string.is_empty()) {
		return p_string;
	}
	const String lang = (p_language.is_empty()) ? TranslationServer::get_singleton()->get_tool_locale() : p_language;
	// Convert to UTF-16.
	Char16String utf16 = p_string.utf16();
	Vector<char16_t> upper;
	UErrorCode err = U_ZERO_ERROR;
	int32_t len = u_strToUpper(nullptr, 0, utf16.get_data(), -1, lang.arr);
	ERR_FAIL_COND_V_MSG(err != U_BUFFER_OVERFLOW_ERROR, p_string, u_errorName(err));
	upper.resize(len);
	err = U_ZERO_ERROR;
	u_strToUpper(upper.ptrw(), len, utf16.get_data(), -1, lang.arr);
	ERR_FAIL_COND_V_MSG(U_FAILURE(err), p_string, u_errorName(err));
	// Convert back to UTF-32.
	return String::utf16(upper.ptr(), len);
}
String TextServerAdvanced::_string_to_lower(const String &p_string, const String &p_language) const {