### Godot version

v4.2.dev4.official [549fcce5f]

### System information

Ubuntu 20.04 LTS

### Issue description

See title.

### Steps to reproduce

1. Create a new project
2. Create a csv file that includes the following
```
key,ar
key,placeholder
```
3. Add the generated `.translation` file to Project -> Project Settings... -> Localization
4. In Project -> Project Settings... -> Internationalization -> Locale, set `Test` to `ar`
5. Add a `LineEdit` node and type `-=[]{}`
6. Run the project, and notice that the text is on the right side, but the symbols are incorrectly in LTR (`-=[]{}`).  Correct output is `{}[]=-`
7. Back in the editor, add a single Arabic letter (any will do), and notice that `LineEdit` immediately (and correctly) flips the symbols, and the newly-added Arabic letter, to RTL.

**Notes**
- Identical behavior is seen with `TextEdit`.
- The purpose of steps 2-4 are to simulate an Arabic environment when the project is run, despite `OS.get_locale() == "en"` (or your system's current language).

### Minimal reproduction project

[rtlsymbols.zip](https://github.com/godotengine/godot/files/12525509/rtlsymbols.zip)
} 
			case HB_OT_NAME_ID_LIGHT_BACKGROUND: {
				name = "light_background_palette";
			} 
			case HB_OT_NAME_ID_DARK_BACKGROUND: {
				name = "dark_background_palette";
			} 
			case HB_OT_NAME_ID_VARIATIONS_PS_PREFIX: {
				name = "postscript_name_prefix";
			} 
			default: {
				name = vformat("unknown_%d", names[i].name_id);
			} 
		}
		String text;
		unsigned int text_size = hb_ot_name_get_utf32(hb_face, names[i].name_id, names[i].language, nullptr, nullptr) + 1;
		text.resize(text_size);
		hb_ot_name_get_utf32(hb_face, names[i].name_id, names[i].language, &text_size, (uint32_t *)text.ptrw());
		if (!text.is_empty()) {
			Dictionary &id_string = names_for_lang[String(hb_language_to_string(names[i].language))];
			id_string[name] = text;
		}
	}
	Dictionary out;
	for (const KeyValue<String, Dictionary> &E : names_for_lang) {
		out[E.key] = E.value;
	}
	return out;
}
void TextServerAdvanced::_font_set_antialiasing(const RID &p_font_rid, TextServer::FontAntialiasing p_antialiasing) {