[UR] Add inter-process communication extension functionality

[steffenlarsen]

This commit adds functions for handling inter-process communication (IPC) of device USM memory allocations. Support for these functions are implemented for both level zero adapters and the CUDA adapter.

[steffenlarsen]

Draft SYCL extension building on this: #20018

[steffenlarsen]

After some user feedback, the current API should reflect their needs in relation to #20018.

Friendly ping - @intel/dpcpp-nativecpu-reviewers @intel/llvm-reviewers-cuda @intel/unified-runtime-reviewers-opencl @intel/unified-runtime-reviewers-level-zero @intel/unified-runtime-reviewers

[steffenlarsen]

Friendly ping - @intel/dpcpp-nativecpu-reviewers @intel/llvm-reviewers-cuda @intel/unified-runtime-reviewers-opencl @intel/unified-runtime-reviewers-level-zero @intel/unified-runtime-reviewers

[bratpiorka]

CUDA/OpenCL/HIP + UMF usage LGTM

[steffenlarsen]

CUDA/OpenCL/HIP + UMF usage LGTM

Thank you, @bratpiorka ! I had some feedback on the SYCL extension which changes the approach a little, primarily dropping the UR struct entirely in favor of using the handle data directly. I will make sure it stabilizes and you can have another look at the changes.

[bratpiorka]

Thank you, @bratpiorka ! I had some feedback on the SYCL extension which changes the approach a little, primarily dropping the UR struct entirely in favor of using the handle data directly. I will make sure it stabilizes and you can have another look at the changes.

yes, I see, great - in my opinion, it looks simpler for the user

[steffenlarsen]

@intel/unified-runtime-reviewers-level-zero - Friendly ping.

[steffenlarsen]

There are no longer any active reviewers in @intel/dpcpp-nativecpu-reviewers so I will bypass their approval.