Improve device/runtime handling

[fmigneault]

🚀 Feature Request

Combining #97 and #109, it is possible to facilitate the resolution of mlm:accelerator (and other similar properties) with corresponding torch.device when exporting programs/archive representing the model.

Utility methods to perform this mapping should be provided and employed wherever applicable.

🔉 Motivation

Reduce the number of inputs that have to be explicitly provided by users, and automate their resolution to avoid MLM metadata inconsistencies. However, parameters must remain available to provide "overrides" in case a given device is explicitly desired for one situation or another.

📡 Alternatives

Leave it up to users to map and provide devices explicitly in each place.

📎 Additional context

• Torch/TorchGeo Export & Packaging #97
• add cpu device type as an alias for amd64 #109

[rbavery]

@isaaccorley or I can pick this up. I'll be on vacation starting next week until August 20th so if he doesn't get to it by then I can do it after.