Update CI to use neuroinformatics action.

[JoeZiminski]

          Looks good @JoeZiminski ! I reviewed this by commit, as suggested

@niksirbi how did things go in the end with the NIU test action, can I help with anything? I took the lazy way and revereted back to not using for now :'D

We kinda found a functional workaround for movement which allows us to keep using the NIU test action as is.

Basically what we do is the following:

• in the workflow we setup conda before we call the NIU test action.
• In pyproject.toml we configure tox-conda to install pytables in the test environment (for datashuttle that would be rclone).

The problem was that tox-conda could not find the conda executable on some OSes (macos-14 and windows), but setting up and activating conda before the tests seems to have taken care of that.

Maybe worth a try for datashuttle as well?

Originally posted by @niksirbi in https://github.com/neuroinformatics-unit/datashuttle/pull/314#pullrequestreview-1961314209

[JoeZiminski]

This is not now going to be possible with the different calls to pytest based on OS (SSH tests on linux, not otherwise). Instead we'll have to keep up with NIU best practices manually.