Basically a spin-off of #3321, but only restricted to ARM MacOS so we see that the workflows actually work as intended, later we can easily expand them to accommodate other platforms and Python versions.
Fixes #2359.

Changes

• add workflow template for building a wheel on any platform with any Python version (wheels-template.yml)
• add workflow template for uploading a wheel to PyPI (pypi-upload-template.yml)
• add wheels-ci.yml for running the CI on PRs and main branch (for min and max Python versions only!)
• add wheels-nightly.yml uploading nightly releases. Once this works, I can introduce a workflow for the stable releases as well
• add option to use dotted Python versions in build_wheels.bash

This means that the workflow for building wheels is now entirely reusable, and takes the following inputs:

• platform for which to build the wheel
• Python version
• build type (nightly or release); this is done so the change_name.py script is called appropriately (otherwise the wheel will be called neuron_nightly instead of neuron)
• the clone depth of the repo; this is useful for the nightly to get the correct version tag, otherwise we are wasting time
• optimize_rxd: for nightly and (future!) releases we use optimization level 2, while for CI (both PRs and main branch) we use opt level 0. This flag could admittedly be more general to take any env variables, but then one needs to parse it with something (should input be comma-separated? JSON? Lots of ways to tackle this...), so I opted for a simple boolean flag instead.