### 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)

context_menu_enabled = p_enable;
}
bool LineEdit::is_context_menu_enabled() {
	return context_menu_enabled;
}
bool LineEdit::is_menu_visible() const {
	return menu && menu->is_visible();
}
PopupMenu *LineEdit::get_menu() const {
	if (!menu) {
		const_cast<LineEdit *>(this)->_generate_context_menu();
	}
	return menu;
}
void LineEdit::_editor_settings_changed() {
#ifdef TOOLS_ENABLED
	set_caret_blink_enabled(EDITOR_GET("text_editor/appearance/caret/caret_blink"));
	set_caret_blink_interval(EDITOR_GET("text_editor/appearance/caret/caret_blink_interval"));
#endif
}
void LineEdit::set_expand_to_text_length_enabled(bool p_enabled) {
	expand_to_text_length = p_enabled;
	update_minimum_size();
	set_caret_column(caret_column);
}
bool LineEdit::is_expand_to_text_length_enabled() const {
	return expand_to_text_length;
}
void LineEdit::set_clear_button_enabled(bool p_enabled) {