Fix for non-diagonal Fock operator and SBPLX update
Fixes
- fixes the usage of non-diagonal Fock operators (previously it would throw an error)
- moves the code of SBPLX optimizer to external library qiskit_machine_learning (see https://github.com/qiskit-community/qiskit-machine-learning/pull/924)
- fixes some issues with pytest not being able to detect tvha within the nox test environment
Edited by Clemens Possel