### Godot version

4.1.beta3

### System information

Fedora Workstation 38 - Godot 4.1.beta3 - Vulkan (Forward+)

### Issue description

**This is an issue created by the production team, we're working on it**

Currently, it's impossible to call virtual functions within GDScript.

This currently returns an error:
```gdscript
# a.gd
extends Node

func _process(delta: float) -> void:
	pass
```

```gdscript
# main.gd
extends Node

var my_node: Node = preload("res://a.gd").new()

func _process(delta: float) -> void:
	my_node._process(delta)  # Cannot call virtual function "_process()" because it hasn't been defined.
```

### Steps to reproduce

1. Create a script (`a.gd`) based on `Node` that declares `_process()`;
2. Create a main node;
3. Attach a script to the main node;
4. Initialize a variable with a new `a.gd` instance;
5. Try to run `_process()` on that node;
6. Find out that it returns an error.

### Minimal reproduction project

[virtual_functions.zip (updated)](https://github.com/godotengine/godot/files/11823992/virtual_functions.zip)


break;
		}
		GDScriptParser::DataType par_type = p_par_types[i];
		if (par_type.is_hard_type() && p_call->arguments[i]->is_constant) {
			update_const_expression_builtin_type(p_call->arguments[i], par_type, "pass");
		}
		GDScriptParser::DataType arg_type = p_call->arguments[i]->get_datatype();
		if (arg_type.is_variant() || !arg_type.is_hard_type()) {
			
			if (!(par_type.is_hard_type() && par_type.is_variant())) {
				mark_node_unsafe(p_call->arguments[i]);
			}
		} else if (par_type.is_hard_type() && !is_type_compatible(par_type, arg_type, true)) {
			
			mark_node_unsafe(p_call);
			if (!is_type_compatible(arg_type, par_type)) {
				push_error(vformat(R"*(Invalid argument for "%s()" function: argument %d should be "%s" but is "%s".)*",
								   p_call->function_name, i + 1, par_type.to_string(), arg_type.to_string()),
						p_call->arguments[i]);
			}
#ifdef DEBUG_ENABLED
		} else if (par_type.kind == GDScriptParser::DataType::BUILTIN && par_type.builtin_type == Variant::INT && arg_type.kind == GDScriptParser::DataType::BUILTIN && arg_type.builtin_type == Variant::FLOAT) {
			parser->push_warning(p_call, GDScriptWarning::NARROWING_CONVERSION, p_call->function_name);
#endif
		}
	}
}
#ifdef DEBUG_ENABLED
void GDScriptAnalyzer::is_shadowing(GDScriptParser::IdentifierNode *p_local, const String &p_context) {