[Bug]: Synchronise PyBOP with PyBaMM@develop

[BradyPlanden]

Python Version

N/A

Describe the bug

PyBaMM's breaking changes ahead of their v24.5 release can be found here: https://github.com/pybamm-team/PyBaMM/blob/develop/CHANGELOG.md

Our most recent weekly test against their develop branch can be found here: https://github.com/pybop-team/PyBOP/actions/runs/8886663430/job/24400545873

This issue is to fix our codebase for these breaking changes.

Steps to reproduce the behaviour

pytest --unit and pytest --integration with pybamm@develop installed in virtualenv

Relevant log output

No response