### 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)
if (sd->orientation == ORIENTATION_HORIZONTAL) {
						sd->ascent = MAX(sd->ascent, get_hex_code_box_size(gl.font_size, gl.index).y);
					} else {
						sd->ascent = MAX(sd->ascent, Math::round(get_hex_code_box_size(gl.font_size, gl.index).x * 0.5));
						sd->descent = MAX(sd->descent, Math::round(get_hex_code_box_size(gl.font_size, gl.index).x * 0.5));
					}
				}
				sd->width += gl.advance * gl.repeat;
			}
		}
		_realign(sd);
	}
	return true;
}
void TextServerAdvanced::_realign(ShapedTextDataAdvanced *p_sd) const {
	
	double full_ascent = p_sd->ascent;
	double full_descent = p_sd->descent;
	for (KeyValue<Variant, ShapedTextDataAdvanced::EmbeddedObject> &E : p_sd->objects) {
		if ((E.value.pos >= p_sd->start) && (E.value.pos < p_sd->end)) {
			if (p_sd->orientation == ORIENTATION_HORIZONTAL) {
				switch (E.value.inline_align & INLINE_ALIGNMENT_TEXT_MASK) {
					case INLINE_ALIGNMENT_TO_TOP: {
						E.value.rect.position.y = -p_sd->ascent;
					} 
					case INLINE_ALIGNMENT_TO_CENTER: {
						E.value.rect.position.y = (-p_sd->ascent + p_sd->descent) / 2;
					} 
					case INLINE_ALIGNMENT_TO_BASELINE: {