* Update Ubuntu to 22.04.
* Add libxtst-dev from https://github.com/microsoft/vcpkg/pull/24934
* Add standard prereqs.
* Update some package references for Ubuntu 22.04.
* [cuda] Update to search in /usr/bin as used on Ubuntu 22.04.
* [cudnn] Add where ubuntu 22.04 puts it.
* Add update-nvidia-cudnn calls.
* Update powershell to 7.2.5
* Re-add NCCL installation from CUDA official sources.
* Update pools.