### 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
bool has_valid_setter = false;
				if (member.variable->getter_pointer != nullptr) {
					if (p_class->has_function(member.variable->getter_pointer->name)) {
						getter_function = p_class->get_member(member.variable->getter_pointer->name).function;
					}
					if (getter_function == nullptr) {
						push_error(vformat(R"(Getter "%s" not found.)", member.variable->getter_pointer->name), member.variable);
					} else {
						GDScriptParser::DataType return_datatype = getter_function->datatype;
						if (getter_function->return_type != nullptr) {
							return_datatype = getter_function->return_type->datatype;
							return_datatype.is_meta_type = false;
						}
						if (getter_function->parameters.size() != 0 || return_datatype.has_no_type()) {
							push_error(vformat(R"(Function "%s" cannot be used as getter because of its signature.)", getter_function->identifier->name), member.variable);
						} else if (!is_type_compatible(member.variable->datatype, return_datatype, true)) {
							push_error(vformat(R"(Function with return type "%s" cannot be used as getter for a property of type "%s".)", return_datatype.to_string(), member.variable->datatype.to_string()), member.variable);
						} else {
							has_valid_getter = true;
#ifdef DEBUG_ENABLED
							if (member.variable->datatype.builtin_type == Variant::INT && return_datatype.builtin_type == Variant::FLOAT) {
								parser->push_warning(member.variable, GDScriptWarning::NARROWING_CONVERSION);
							}
#endif
						}
					}
				}
				if (member.variable->setter_pointer != nullptr) {
					if (p_class->has_function(member.variable->setter_pointer->name)) {
						setter_function = p_class->get_member(member.variable->setter_pointer->name).function;