Mac run failed, this could be related to the old miniconda setup

For 1.3.2 we built on x86 Mac (macos-13) but it would be good to
have (and test) some ARM wheels as well. We're having trouble building
those on older Python versions, but if we upload 3.10 and 3.11 wheels
to PyPI that should be somewhat useful.

This action is not intended to stick around once py3.8 and 3.9 are
deprecated; then we will try to build intel and ARM wheels in the same
job.

This needs to be built against the version-tagged commit or the
filenames are wrong for PyPI

workflow_dispatch from non-master doesn't seem to be
registering. Instead let's try directly checking-out the target release.

- The push trigger allowed a one-time ARM build which has now been
  manually pushed up to PyPI. (Automatic push didn't work, needed to
  download artifacts and use twine.) Remove it so the CI doesn't keep
  rebuilding and failing push.

- Now let's confirm that the expected configurations work by testing
  the PyPI release on both Intel and ARM Mac.

  (I'm expecting that Intel (macos-13) will work across versions, and
   ARM (macos-latest) will get the new wheels, while failing to build
   on Python 3.8, 3.9.)

Troubleshooting test failures here... I *think* the wheels are all
built against pre-v2 numpy and so this test is failing due to the ABI
change when test runner uses a newer version.

In this case we can go ahead and make a new release that builds
against the newer Numpy ABI, which requires the min version to be
increased to 1.25.

One issue will be that Mantid is still on 1.24.

Conda can't install 1.20 so we weren't getting useful information from
the failure.