### 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)

BIND_ENUM_CONSTANT(MENU_DISPLAY_UCC);
	BIND_ENUM_CONSTANT(MENU_SUBMENU_INSERT_UCC);
	BIND_ENUM_CONSTANT(MENU_INSERT_LRM);
	BIND_ENUM_CONSTANT(MENU_INSERT_RLM);
	BIND_ENUM_CONSTANT(MENU_INSERT_LRE);
	BIND_ENUM_CONSTANT(MENU_INSERT_RLE);
	BIND_ENUM_CONSTANT(MENU_INSERT_LRO);
	BIND_ENUM_CONSTANT(MENU_INSERT_RLO);
	BIND_ENUM_CONSTANT(MENU_INSERT_PDF);
	BIND_ENUM_CONSTANT(MENU_INSERT_ALM);
	BIND_ENUM_CONSTANT(MENU_INSERT_LRI);
	BIND_ENUM_CONSTANT(MENU_INSERT_RLI);
	BIND_ENUM_CONSTANT(MENU_INSERT_FSI);
	BIND_ENUM_CONSTANT(MENU_INSERT_PDI);
	BIND_ENUM_CONSTANT(MENU_INSERT_ZWJ);
	BIND_ENUM_CONSTANT(MENU_INSERT_ZWNJ);
	BIND_ENUM_CONSTANT(MENU_INSERT_WJ);
	BIND_ENUM_CONSTANT(MENU_INSERT_SHY);
	BIND_ENUM_CONSTANT(MENU_MAX);
	BIND_ENUM_CONSTANT(KEYBOARD_TYPE_DEFAULT);
	BIND_ENUM_CONSTANT(KEYBOARD_TYPE_MULTILINE);
	BIND_ENUM_CONSTANT(KEYBOARD_TYPE_NUMBER);
	BIND_ENUM_CONSTANT(KEYBOARD_TYPE_NUMBER_DECIMAL);
	BIND_ENUM_CONSTANT(KEYBOARD_TYPE_PHONE);
	BIND_ENUM_CONSTANT(KEYBOARD_TYPE_EMAIL_ADDRESS);
	BIND_ENUM_CONSTANT(KEYBOARD_TYPE_PASSWORD);
	BIND_ENUM_CONSTANT(KEYBOARD_TYPE_URL);
	ADD_PROPERTY(PropertyInfo(Variant::STRING, "text"), "set_text", "get_text");
	ADD_PROPERTY(PropertyInfo(Variant::STRING, "placeholder_text"), "set_placeholder", "get_placeholder");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "alignment", PROPERTY_HINT_ENUM, "Left,Center,Right,Fill"), "set_horizontal_alignment", "get_horizontal_alignment");