### 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
GDScriptParser::DataType nil_type;
	nil_type.builtin_type = Variant::NIL;
	nil_type.type_source = GDScriptParser::DataType::ANNOTATED_INFERRED;
	return get_operation_type(p_operation, p_a, nil_type, r_valid, p_source);
}
GDScriptParser::DataType GDScriptAnalyzer::get_operation_type(Variant::Operator p_operation, const GDScriptParser::DataType &p_a, const GDScriptParser::DataType &p_b, bool &r_valid, const GDScriptParser::Node *p_source) {
	GDScriptParser::DataType result;
	result.kind = GDScriptParser::DataType::VARIANT;
	Variant::Type a_type = p_a.builtin_type;
	Variant::Type b_type = p_b.builtin_type;
	if (p_a.kind == GDScriptParser::DataType::ENUM) {
		if (p_a.is_meta_type) {
			a_type = Variant::DICTIONARY;
		} else {
			a_type = Variant::INT;
		}
	}
	if (p_b.kind == GDScriptParser::DataType::ENUM) {
		if (p_b.is_meta_type) {