[llvm] [Offload] For AMDGPU driver, use product name (PR #155632)

[Ross Brunton via llvm-commits]

RossBrunton wrote:

I've pushed up a change which leaves NAME as is, but adds `PRODUCT_NAME` as a new property.

For my AMD device, `NAME` will be `gfx1100` while `PRODUCT_NAME` will be "Radeon RX 7900
GRE". On Nvidia, both `NAME` and `PRODUCT_NAME` will be something like "NVIDIA GeForce GT 1030" and the host device will have both values as "Virtual Host Device".

Although, would `ARCH` be a better name than `NAME`?

https://github.com/llvm/llvm-project/pull/155632