Nightly actions failing

[woodsp-ibm]

It appears nightly actions have been failing for the past few nights.

As in qiskit-algorithms and qiskit-machine-learning it seems scipy 1.16.0 released when the tests started failing (Jun 22). Note the same tests that are presently passing are under Python 3.9 and 3.10. which are still using the earlier 1.15.3 as it seems 1.16.0 is now only for 3.11 and above

FYI I did this qiskit-community/qiskit-algorithms#234 to sort issues there that arose after scipy 1.16.0 came out. One or two changes, since optimizers were copied here, may be more directly relevant. The issues were all around when using COBYLA where the implementation was changed in 1.16.0 - the PR has quite a few comments that may be of help here,

I assume this may well impact #654 too

[t-imamichi]

SciPy 1.16 updates COBYLA implementation according to the release note.
https://docs.scipy.org/doc/scipy/release/1.16.0-notes.html#scipy-optimize-improvements