[CI] Require C++17 + CMake 3.18; Use CUDA 11.8 in CI (#8853)

* Update to C++17

* Turn off unity build

* Update CMake to 3.18

* Use MSVC 2022 + CUDA 11.8

* Re-create stack for worker images

* Allocate more disk space for Windows

* Tempiorarily disable clang-tidy

* RAPIDS now requires Python 3.10+

* Unpin cuda-python

* Use latest NCCL

* Use Ubuntu 20.04 in RMM image

* Mark failing mgpu test as xfail

tests/buildkite/infrastructure/worker-image-pipeline/metadata.py

@@ -13,6 +13,6 @@ IMAGE_PARAMS = {
         "BootstrapScript": "windows-gpu-bootstrap.yml",
         "InstanceType": "g4dn.2xlarge",
         "InstanceOperatingSystem": "Windows",
-        "VolumeSize": "80",  # in GiBs
+        "VolumeSize": "120",  # in GiBs
     },
 }