### 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)

bool drop_override = Control::can_drop_data(p_point, p_data); 
	if (drop_override) {
		return drop_override;
	}
	return is_editable() && p_data.get_type() == Variant::STRING;
}
void LineEdit::drop_data(const Point2 &p_point, const Variant &p_data) {
	Control::drop_data(p_point, p_data);
	if (p_data.get_type() == Variant::STRING && is_editable()) {
		set_caret_at_pixel_pos(p_point.x);
		int caret_column_tmp = caret_column;
		bool is_inside_sel = selection.enabled && caret_column >= selection.begin && caret_column <= selection.end;
		if (Input::get_singleton()->is_key_pressed(Key::CTRL)) {
			is_inside_sel = selection.enabled && caret_column > selection.begin && caret_column < selection.end;
		}
		if (selection.drag_attempt) {
			selection.drag_attempt = false;
			if (!is_inside_sel) {
				if (!Input::get_singleton()->is_key_pressed(Key::CTRL)) {
					if (caret_column_tmp > selection.end) {
						caret_column_tmp = caret_column_tmp - (selection.end - selection.begin);
					}
					selection_delete();
				}