### 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)

iterate_opcode = GDScriptFunction::OPCODE_ITERATE_VECTOR2;
					break;
				case Variant::VECTOR2I:
					begin_opcode = GDScriptFunction::OPCODE_ITERATE_BEGIN_VECTOR2I;
					iterate_opcode = GDScriptFunction::OPCODE_ITERATE_VECTOR2I;
					break;
				case Variant::VECTOR3:
					begin_opcode = GDScriptFunction::OPCODE_ITERATE_BEGIN_VECTOR3;
					iterate_opcode = GDScriptFunction::OPCODE_ITERATE_VECTOR3;
					break;
				case Variant::VECTOR3I:
					begin_opcode = GDScriptFunction::OPCODE_ITERATE_BEGIN_VECTOR3I;
					iterate_opcode = GDScriptFunction::OPCODE_ITERATE_VECTOR3I;
					break;
				case Variant::STRING:
					begin_opcode = GDScriptFunction::OPCODE_ITERATE_BEGIN_STRING;
					iterate_opcode = GDScriptFunction::OPCODE_ITERATE_STRING;
					break;
				case Variant::DICTIONARY:
					begin_opcode = GDScriptFunction::OPCODE_ITERATE_BEGIN_DICTIONARY;
					iterate_opcode = GDScriptFunction::OPCODE_ITERATE_DICTIONARY;
					break;
				case Variant::ARRAY:
					begin_opcode = GDScriptFunction::OPCODE_ITERATE_BEGIN_ARRAY;
					iterate_opcode = GDScriptFunction::OPCODE_ITERATE_ARRAY;
					break;
				case Variant::PACKED_BYTE_ARRAY:
					begin_opcode = GDScriptFunction::OPCODE_ITERATE_BEGIN_PACKED_BYTE_ARRAY;
					iterate_opcode = GDScriptFunction::OPCODE_ITERATE_PACKED_BYTE_ARRAY;
					break;