### 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)

is_member = true;
					setter_function = codegen.script->member_indices[var_name].setter;
					has_setter = setter_function != StringName();
					is_in_setter = has_setter && setter_function == codegen.function_name;
					member.mode = GDScriptCodeGenerator::Address::MEMBER;
					member.address = codegen.script->member_indices[var_name].index;
					member.type = codegen.script->member_indices[var_name].data_type;
				}
				GDScriptCodeGenerator::Address target;
				if (is_member) {
					target = member; 
				} else {
					target = _parse_expression(codegen, r_error, assignment->assignee);
					if (r_error) {
						return GDScriptCodeGenerator::Address();
					}
				}
				GDScriptCodeGenerator::Address assigned_value = _parse_expression(codegen, r_error, assignment->assigned_value);
				if (r_error) {
					return GDScriptCodeGenerator::Address();
				}
				GDScriptCodeGenerator::Address to_assign;
				bool has_operation = assignment->operation != GDScriptParser::AssignmentNode::OP_NONE;
				if (has_operation) {
					
					GDScriptCodeGenerator::Address op_result = codegen.add_temporary(_gdtype_from_datatype(assignment->get_datatype(), codegen.script));
					GDScriptCodeGenerator::Address og_value = _parse_expression(codegen, r_error, assignment->assignee);
					gen->write_binary_operator(op_result, assignment->variant_op, og_value, assigned_value);
					to_assign = op_result;
					if (og_value.mode == GDScriptCodeGenerator::Address::TEMPORARY) {