### Godot version

4.0 Beta10

### System information

Windows 10, Vulkan, GTX1060

### Issue description

`PropertyTweener`'s methods' return value are not discarded and effect the unary operator at next line.

In Editor:
![in_editor](https://user-images.githubusercontent.com/61624558/210715100-04bdf283-7954-4be3-94ca-338987b24c5b.png)


In cpp:
![in_cpp](https://user-images.githubusercontent.com/61624558/210715127-519f6d54-fc15-468f-9aca-ba7d387a5a7b.png)


### Steps to reproduce

Just run the Minimal reproduction project.

### Minimal reproduction project

[Bug Report.zip](https://github.com/godotengine/godot/files/10349829/Bug.Report.zip)

bool all_is_constant = true;
	for (int i = 0; i < p_dictionary->elements.size(); i++) {
		const GDScriptParser::DictionaryNode::Pair &element = p_dictionary->elements[i];
		if (element.value->type == GDScriptParser::Node::ARRAY) {
			const_fold_array(static_cast<GDScriptParser::ArrayNode *>(element.value));
		} else if (element.value->type == GDScriptParser::Node::DICTIONARY) {
			const_fold_dictionary(static_cast<GDScriptParser::DictionaryNode *>(element.value));
		}
		all_is_constant = all_is_constant && element.key->is_constant && element.value->is_constant;
		if (!all_is_constant) {
			return;
		}
	}
	Dictionary dict;
	for (int i = 0; i < p_dictionary->elements.size(); i++) {
		const GDScriptParser::DictionaryNode::Pair &element = p_dictionary->elements[i];
		dict[element.key->reduced_value] = element.value->reduced_value;
	}
	p_dictionary->is_constant = true;
	p_dictionary->reduced_value = dict;
}
GDScriptParser::DataType GDScriptAnalyzer::type_from_variant(const Variant &p_value, const GDScriptParser::Node *p_source) {
	GDScriptParser::DataType result;
	result.is_constant = true;
	result.kind = GDScriptParser::DataType::BUILTIN;
	result.builtin_type = p_value.get_type();
	result.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT; 
	if (p_value.get_type() == Variant::OBJECT) {