Linux-aarch64 support?

- [x] I read [the conda-forge documentation](https://conda-forge.org/docs/user/introduction.html#how-can-i-install-packages-from-conda-forge) and could not find the solution for my problem there.

Issue:

Tensorflow builds are not currently run for aarch64. Raising this issue here before just opening a PR to add this to the migrator since I suspect there may be issues with running linux-aarch64 CI with a package of this size. Note that GPU support is not necessary for my use case, I'd just like to get to the point on this architecture where enough is in place to open and work with pretrained model files.