Remove qutip.control and replace with qutip_qtrl.

[hodgestar]

Description
Remove qutip.control and replace it with the QuTiP family package qutip-qtrl.

Related issues or PRs

• None

[coveralls]

Coverage: 75.43% (+3.08%) from 72.353% when pulling 92edcd4 on feature/replace-qutip-control-with-qutip-qtrl into ae6d693 on master.

[Ericgig]

Happy to see this moved out.
But qutip-qip and some tutorial use it.
So we should wait for qutip-ctrl to be added to their requirement before merging.

[hodgestar]

But qutip-qip and some tutorial use it. So we should wait for qutip-qctrl to be added to their requirement before merging.

Good point. I will talk to @BoxiLi.

[hodgestar]

The tutorials only use it indirectly, so it's just qutip-qip that we need to update.

Update: This might be a little tricky, since qutip-qtrl only supports QuTiP v5 and qutip-qip supports both v4 and v5.

[Ericgig]

Some of the example notebook on the web page call it directly: https://nbviewer.org/github/qutip/qutip-notebooks/blob/master/examples/control-pulseoptim-QFT.ipynb
It seems they are still in qutip-notebook.

[hodgestar]

Some of the example notebook on the web page call it directly: https://nbviewer.org/github/qutip/qutip-notebooks/blob/master/examples/control-pulseoptim-QFT.ipynb It seems they are still in qutip-notebook.

The qutip-notebooks are only for QuTiP v4, but yes, we do have to migrate those to qutip-tutorials and make them v5 compatible.