More gpuCI updates

[alliepiper]

Requires NVIDIA/cub#425.

This branch makes the following changes to gpuCI:

• Splits main integration builds from prb pull request builds.
• Split gpu builds into cuda and nvhpc subsets.
• Split cpu builds into cuda and nocuda subsets.

This results in the following 8 new configurations:

• main-cpu-cuda
• main-cpu-nocuda
• main-gpu-cuda
• main-gpu-nvhpc
• prb-cpu-cuda
• prb-cpu-nocuda
• prb-gpu-cuda
• prb-gpu-nvhpc

Each configuration is controlled by three configuration files:

• an axis definition in ci/axis/<config>.yml
• a launch script in ci/gpuci/<config>.bash
• build/test configurations in CMakePresets.json named gpuci-<config>.

The CMake/CTest configuration logic has been moved out of the ci/common/build.bash script and into a CMakePresets.json file. The pre-existing Coverage Plans are still usable from ci/local/build.bash, but each new gpuCI configuration uses its own unique preset.

Moving all configuration logic to this file will eventually allow us to manage both gpuCI and DVS configurations from the same place, using the same building blocks, with greater per-config flexibility.

ci/common/build.bash still performs some per-compiler configuration, but options that describe the amount of work to do has been abstracted into the presets.

[alliepiper]

This is blocked waiting for gpuCI to enable the new builds. Once this is done, I'll do some testing and adjust the configs as needed before merging and disabling the old gpuCI builds. I've requested that the old build remain functional during the transition to minimize disruption.

[alliepiper]

Closing as gpuCI is not the way forward. I'll leave this branch around since the CMakePresets stuff would still be useful at some point, but this version is very out-of-date and will be obsoleted by the monorepo.