Tag linux wheels with new manylinux platform tags

[auscompgeek]

The accepted PEP 600 defines new manylinux tags corresponding to glibc versions. By my understanding, WPILib's linuxx86-64 corresponds to Ubuntu 18.04, which would correspond to the platform tag manylinux_2_27_x86_64.

PEP 599 (manylinux2014) also explicitly allows the armv7l and aarch64 platforms, so we should be good to publish wheels for all WPILib Linux platforms once we have the infrastructure.

[auscompgeek]

Unfortunately it looks like pip doesn't understand PEP 600 yet. But the standard exists so that shouldn't really stop us from doing it anyway I guess.

[auscompgeek]

Looks like pip and PyPI speak PEP 600 now. PyPA's tracking issue: pypa/manylinux#542

[auscompgeek]

pip 20.3 is out now with PEP 600 support.

We won't be able to use auditwheel on most of our packages, so we'll have to manually (in CI) rename our wheels. But this will mean we can host our x86-64 Linux wheels on PyPI.