Support numpy 1.24 across all simulators

[pgleeson]

numpy 1.24 has removed a number of previously deprecated methods/fields (e.g. numpy.int, numpy.float) causing multiple test failures. These changes need to be made in relevant packages (e.g. PyNN) and then this line removed from here:

osb-model-validation/.github/workflows/ci.yml

Line 61 in d40b541

pip install 'numpy<=1.23.0' # temp fix for https://levelup.gitconnected.com/fix-attributeerror-module-numpy-has-no-attribute-float-d7d68c5a4971

[sanjayankur31]

Numpy 2.x just got released, so we need to bump up our numpy here to check if it works with new numpy versions. It's affecting other repos and OMV based workflows too, eg:

OpenSourceBrain/SBMLShowcase#23