[BUG] qml.PhaseAdder adds "None" work_wire when this is not specified

[KetpuntoG]

Expected behavior

qml.PhaseAdder(1, x_wires = [1,2]).wires

This should return

[1,2]

Actual behavior

The output is [1,2, None]

Additional information

Same issue with qml.OutAdder and qml.OutMultiplier

Source code

No response

Tracebacks

No response

System information

Name: PennyLane
Version: 0.39.0.dev20
Summary: PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network.
Home-page: https://github.com/PennyLaneAI/pennylane
Author: 
Author-email: 
License: Apache License 2.0
Location: /Users/guillermoalonso/Documents/GitHub/pennylane
Editable project location: /Users/guillermoalonso/Documents/GitHub/pennylane
Requires: appdirs, autograd, autoray, cachetools, networkx, numpy, packaging, pennylane-lightning, requests, rustworkx, scipy, toml, typing_extensions
Required-by: PennyLane-Catalyst, PennyLane_Lightning

Platform info:           macOS-14.6.1-arm64-arm-64bit
Python version:          3.9.6
Numpy version:           1.26.4
Scipy version:           1.12.0
Installed devices:
- default.clifford (PennyLane-0.39.0.dev20)
- default.gaussian (PennyLane-0.39.0.dev20)
- default.mixed (PennyLane-0.39.0.dev20)
- default.qubit (PennyLane-0.39.0.dev20)
- default.qutrit (PennyLane-0.39.0.dev20)
- default.qutrit.mixed (PennyLane-0.39.0.dev20)
- default.tensor (PennyLane-0.39.0.dev20)
- null.qubit (PennyLane-0.39.0.dev20)
- reference.qubit (PennyLane-0.39.0.dev20)
- sparse.qubit (PennyLane-0.39.0.dev20)
- lightning.qubit (PennyLane-Lightning-0.38.0)
- nvidia.custatevec (PennyLane-Catalyst-0.8.1)
- nvidia.cutensornet (PennyLane-Catalyst-0.8.1)
- oqc.cloud (PennyLane-Catalyst-0.8.1)
- softwareq.qpp (PennyLane-Catalyst-0.8.1)

Existing GitHub issues

• I have searched existing GitHub issues to make sure the issue does not already exist.

[albi3ro]

Might be time to reconsider forbidding None as a wire value.

[KetpuntoG]

Might be time to reconsider forbidding None as a wire value.

I think that makes a lot of sense