### Godot version

4.0.beta13

### System information

Mageia 9, Linux

### Issue description

When exporting a trivial .NET project with 4.0.beta13, I get the following error:

```
ERROR: Required virtual method EditorExportPlugin::_get_name must be overridden before calling.
   at: _gdvirtual__get_name_call (editor/export/editor_export_plugin.h:123)
```

It doesn't seem to prevent exporting, but should be fixed anyway.

On the first export attempt (not be reproducible in my MRP, needs to be redone from scratch), it also shows this warning:
```
WARNING: Property not found: dotnet/project/assembly_name
     at: get_setting_with_override (core/config/project_settings.cpp:364)
```
Which likely means that we're using `GLOBAL_GET` before we defined the property with `GLOBAL_DEF`.

### Steps to reproduce

- Create a simple project with a hello world C# script
- Export it from Linux to Linux or Windows (didn't test other combinations, would likely have the same issue)
- Check Output dock / console

### Minimal reproduction project

[TestMono.zip](https://github.com/godotengine/godot/files/10445350/TestMono.zip)
r_script_binding.inited = true;
	r_script_binding.type_name = type_name;
	r_script_binding.gchandle = MonoGCHandleData(strong_gchandle, gdmono::GCHandleType::STRONG_HANDLE);
	r_script_binding.owner = p_object;
	// Tie managed to unmanaged
	RefCounted *rc = Object::cast_to<RefCounted>(p_object);
	if (rc) {
		// Unsafe refcount increment. The managed instance also counts as a reference.
		// This way if the unmanaged world has no references to our owner
		// but the managed instance is alive, the refcount will be 1 instead of 0.
		// S
		rc->reference();
		CSharpLanguage::get_singleton()->post_unsafe_reference(rc);
	}
	return true;
}
RBMap<Object *, CSharpScriptBinding>::Element *CSharpLanguage::insert_script_binding(Object *p_object, const CSharpScriptBinding &p_script_binding) {
	return script_bindings.insert(p_object, p_script_binding);
}
void *CSharpLanguage::_instance_binding_create_callback(void *, void *p_instance) {
	CSharpLanguage *csharp_lang = CSharpLanguage::get_singleton();
	MutexLock lock(csharp_lang->language_bind_mutex);
	RBMap<Object *, CSharpScriptBinding>::Element *match = csharp_lang->script_bindings.find((Object *)p_instance);
	if (match) {
		return (void *)match;
	}
	CSharpScriptBinding script_binding;
	return (void *)csharp_lang->insert_script_binding((Object *)p_instance, script_binding);
}
void CSharpLanguage::_instance_binding_free_callback(void *, void *, void *p_binding) {