### Godot version

4.0.2.stable.official [7a0977ce2]

### System information

Windows 10

### Issue description

LineEdit node with enabled "expand_to_text_length" option and "minimum_character_width = 0" and cleared margins in style overrides still has some empty space inside
![node](https://github.com/godotengine/godot/assets/23380802/86c79678-8422-4a98-8406-602edd7dc48b)
![node settings](https://github.com/godotengine/godot/assets/23380802/11d04d71-bbf1-4c16-8155-fe39b5bbd66b)
![style overrides](https://github.com/godotengine/godot/assets/23380802/6b3c3925-b4bd-455b-aac1-ddeb54a4d796)


### Steps to reproduce

1. Add LineEdit node
2. Set expand_to_text_length = true
3. Set minimum_character_width in theme overrides = 0
4. Set normal to StyleBoxEmpty


### Minimal reproduction project

[LineEdit can't be zero sized.zip](https://github.com/godotengine/godot/files/11566017/LineEdit.can.t.be.zero.sized.zip)

return text;
}
void LineEdit::set_placeholder(String p_text) {
	if (placeholder == p_text) {
		return;
	}
	placeholder = p_text;
	placeholder_translated = atr(placeholder);
	_shape();
	queue_redraw();
}
String LineEdit::get_placeholder() const {
	return placeholder;
}
void LineEdit::set_caret_column(int p_column) {
	if (p_column > (int)text.length()) {
		p_column = text.length();
	}
	if (p_column < 0) {
		p_column = 0;
	}
	caret_column = p_column;
	
	if (!is_inside_tree()) {
		scroll_offset = 0.0;
		return;
	}
	Ref<StyleBox> style = theme_cache.normal;
	bool rtl = is_layout_rtl();