### 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)

_toggle_draw_caret();
				}
			}
		} break;
		case NOTIFICATION_DRAW: {
			int width, height;
			bool rtl = is_layout_rtl();
			Size2 size = get_size();
			width = size.width;
			height = size.height;
			RID ci = get_canvas_item();
			Ref<StyleBox> style = theme_cache.normal;
			if (!is_editable()) {
				style = theme_cache.read_only;
			}
			Ref<Font> font = theme_cache.font;
			if (!flat) {
				style->draw(ci, Rect2(Point2(), size));
			}
			if (has_focus()) {
				theme_cache.focus->draw(ci, Rect2(Point2(), size));
			}
			int x_ofs = 0;
			bool using_placeholder = text.is_empty() && ime_text.is_empty();
			float text_width = TS->shaped_text_get_size(text_rid).x;
			float text_height = TS->shaped_text_get_size(text_rid).y;
			switch (alignment) {
				case HORIZONTAL_ALIGNMENT_FILL:
				case HORIZONTAL_ALIGNMENT_LEFT: {
					if (rtl) {