* we're interested in moving to the modern
`cibuildwheel` machinery for the release/wheel
build process, following NumPy/pandas, etc.

* add some initial infrastructure that successfully
builds Python 3.8, 3.9, and 3.10 Linux x86_64 SciPy wheels
locally for me on a Linux box when running
`cibuildwheel --platform linux`

```
    3 wheels produced in 42 minutes:
        scipy-1.9.0.dev0+1841.27195e4-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
116,067 kB
        scipy-1.9.0.dev0+1841.27195e4-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
115,656 kB
        scipy-1.9.0.dev0+1841.27195e4-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
115,872 kB
```

* this intentionally leaves out CI and other
platforms for now, just getting started, and
borrowing liberally from NumPy when it helps

* copy over some NumPy cibuildwheel testing
infra

[skip actions] [skip circleci] [skip ci] [skip azp]