### 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)

_emit_text_change();
	_clear_redo();
}
void LineEdit::_emit_text_change() {
	emit_signal(SNAME("text_changed"), text);
	text_changed_dirty = false;
}
void LineEdit::_shape() {
	const Ref<Font> &font = theme_cache.font;
	int font_size = theme_cache.font_size;
	if (font.is_null()) {
		return;
	}
	Size2 old_size = TS->shaped_text_get_size(text_rid);
	TS->shaped_text_clear(text_rid);
	String t;
	if (text.length() == 0 && ime_text.length() == 0) {
		t = placeholder_translated;
	} else if (pass) {
		t = secret_character.repeat(text.length() + ime_text.length());
	} else {
		if (ime_text.length() > 0) {
			t = text.substr(0, caret_column) + ime_text + text.substr(caret_column, text.length());
		} else {
			t = text;
		}
	}
	if (text_direction == Control::TEXT_DIRECTION_INHERITED) {
		TS->shaped_text_set_direction(text_rid, is_layout_rtl() ? TextServer::DIRECTION_RTL : TextServer::DIRECTION_LTR);