### 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)

}
	GDScriptCodeGenerator *gen = codegen.generator;
	switch (p_expression->type) {
		case GDScriptParser::Node::IDENTIFIER: {
			
			const GDScriptParser::IdentifierNode *in = static_cast<const GDScriptParser::IdentifierNode *>(p_expression);
			StringName identifier = in->name;
			
			if (codegen.parameters.has(identifier)) {
				return codegen.parameters[identifier];
			}
			
			if (!p_initializer && codegen.locals.has(identifier)) {
				return codegen.locals[identifier];
			}
			
			if (_is_class_member_property(codegen, identifier)) {
				
				GDScriptCodeGenerator::Address temp = codegen.add_temporary(); 
				gen->write_get_member(temp, identifier);
				return temp;
			}
			
			if (!codegen.function_node || !codegen.function_node->is_static) {
				
				if (codegen.script->member_indices.has(identifier)) {
					if (codegen.script->member_indices[identifier].getter != StringName() && codegen.script->member_indices[identifier].getter != codegen.function_name) {
						
						GDScriptCodeGenerator::Address temp = codegen.add_temporary();
						Vector<GDScriptCodeGenerator::Address> args;