CI Testing ROCm

[justusschock]

Since PyTorch now ships ROCm binaries for AMD GPUs we should test against it.

cc @Borda

[Borda]

check out https://www.amd.com/en/processors/epyc-microsoft-azure

[Borda]

@justusschock do you have any suggestion on what kind of HW we could/should use?

[justusschock]

@Borda we need a gpu listed here: probably the radeon rx vega 64 would be the most affordable if we can get it.