### Godot version

4.0 beta 10

### System information

Windows 10

### Issue description

Godot crashes when i accidently name 2 items in an enum the same

EDIT:
The editor freeze for some seconds, then both editor- and console-window dissapear

### Steps to reproduce

Write

```gdscript
enum {
    A,
}
```

and then add a second line with another A:

```gdscript
enum {
    A,
    A # <- crash
}
```

Does not always immediatly happen if i copy&paste items.
Does not happen when i change the script in another editor and open the script in Godot.

### Minimal reproduction project

[enum.zip](https://github.com/godotengine/godot/files/10313759/enum.zip)

GDScriptParser::DataType type;
	type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
	type.kind = GDScriptParser::DataType::SCRIPT;
	type.builtin_type = Variant::OBJECT;
	type.native_type = p_script->get_instance_base_type();
	type.script_type = p_script;
	type.script_path = p_script->get_path();
	type.is_constant = true;
	type.is_meta_type = true;
	return type;
}
static GDScriptParser::DataType make_enum_type(const StringName &p_enum_name, const String &p_base_name, const bool p_meta = false) {
	GDScriptParser::DataType type;
	type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
	type.kind = GDScriptParser::DataType::ENUM;
	type.builtin_type = p_meta ? Variant::DICTIONARY : Variant::INT;
	type.enum_type = p_enum_name;
	type.is_constant = true;
	type.is_meta_type = p_meta;
	
	
	type.native_type = p_base_name + ENUM_SEPARATOR + p_enum_name;
	return type;
}
static GDScriptParser::DataType make_native_enum_type(const StringName &p_enum_name, const StringName &p_native_class, const bool p_meta = true) {