### Godot version

v3.5.1.stable.official [6fed1ffa3]

### System information

Steam OS, Steam Deck

### Issue description

Calling `tween_callback` where the first (object) parameter is a `Reference` doesn't work as I expected.  The code compiles and runs without producing any errors, but the callback function is never executed.

### Steps to reproduce

Running the minimal reproduction project demonstrates the issue.  The code pattern is quite simple:

**ReferenceType.gd**
```gdscript
extends Reference

func foo():
	print("foo was called")
```

**Test.gd**
```gdscript
extends Node2D

func _ready():
	var ref := preload("ReferenceType.gd").new()
	var tween := create_tween()
	tween.tween_interval(1)
	tween.tween_callback(ref, "foo")
```

I suspect that the issue is somehow related to reference-counting, and that `SceneTreeTween` is not updating the object's reference count.  I can get the behavior I expect by modifying the code to call `reference()` and `unreference()` manually, as shown below:

```gdscript
	var ref := preload("ReferenceType.gd").new()
	ref.reference()
	
	var tween := create_tween()
	tween.tween_interval(1)
	tween.tween_callback(ref, "foo")
	tween.tween_callback(ref, "unreference")
```

The documentation strongly recommends against calling these functions "unless you know what you're doing", so it feels like `SceneTreeTween` should handle this.  If this is expected behavior, it would be nice if the `SceneTreeTween` documentation urged caution when using `Reference`. 

### Minimal reproduction project

[ReferenceTween.zip](https://github.com/godotengine/godot/files/10328012/ReferenceTween.zip)

if (current_step == tweeners.size()) {
				loops_done++;
				if (loops_done == loops) {
					running = false;
					dead = true;
					emit_signal(SNAME("finished"));
					break;
				} else {
					emit_signal(SNAME("loop_finished"), loops_done);
					current_step = 0;
					start_tweeners();
#ifdef DEBUG_ENABLED
					if (loops <= 0 && Math::is_equal_approx(rem_delta, initial_delta)) {
						if (!potential_infinite) {
							potential_infinite = true;
						} else {
							
							ERR_FAIL_V_MSG(false, "Infinite loop detected. Check set_loops() description for more info.");
						}
					}
#endif
				}
			} else {
				start_tweeners();
			}
		}
	}
	return true;
}
bool Tween::can_process(bool p_tree_paused) const {