### Godot version

v4.0.beta.custom_build [1d14c054a]

### System information

Kubuntu 22.10

### Issue description

Regression in master (in beta 10 the following script works correctly).

### Steps to reproduce

```gdscript
@tool
extends EditorScript

func wait(time: float) -> void:
    await get_editor_interface().get_tree().create_timer(time).timeout

func _run() -> void:
    reference()
    # Error: Cannot get return value of call to "wait()" because it returns "void".
    await wait(1.0)
    print("Test")
    unreference()
```

### Minimal reproduction project

N/A
#ifdef DEBUG_ENABLED
				} else if (!is_self && !(base_type.is_hard_type() && base_type.kind == GDScriptParser::DataType::BUILTIN)) {
					parser->push_warning(p_call, GDScriptWarning::UNSAFE_METHOD_ACCESS, p_call->function_name, base_type.to_string());
					mark_node_unsafe(p_call);
#endif
				}
			}
		}
		if (!found && (is_self || (base_type.is_hard_type() && base_type.kind == GDScriptParser::DataType::BUILTIN))) {
			String base_name = is_self && !p_call->is_super ? "self" : base_type.to_string();
			push_error(vformat(R"*(Function "%s()" not found in base %s.)*", p_call->function_name, base_name), p_call->is_super ? p_call : p_call->callee);
		} else if (!found && (!p_call->is_super && base_type.is_hard_type() && base_type.kind == GDScriptParser::DataType::NATIVE && base_type.is_meta_type)) {
			push_error(vformat(R"*(Static function "%s()" not found in base "%s".)*", p_call->function_name, base_type.native_type.operator String()), p_call);
		}
	}
	if (call_type.is_coroutine && !p_is_await && !p_is_root) {
		push_error(vformat(R"*(Function "%s()" is a coroutine, so it must be called with "await".)*", p_call->function_name), p_call);
	}
	p_call->set_datatype(call_type);
}
void GDScriptAnalyzer::reduce_cast(GDScriptParser::CastNode *p_cast) {
	reduce_expression(p_cast->operand);
	GDScriptParser::DataType cast_type = resolve_datatype(p_cast->cast_type);
	if (!cast_type.is_set()) {
		mark_node_unsafe(p_cast);
		return;
	}
	cast_type = type_from_metatype(cast_type); 
	p_cast->set_datatype(cast_type);
	if (!cast_type.is_variant()) {