Auto merge of #124850 - dpaoliello:clang2022, r=Kobzol

Upgrade pre-built Clang used in MSVC and MacOS builds, move MSVC builds to Server 2022

Fixes #92948

Example working MacOS and Windows builds: <https://github.com/rust-lang/rust/actions/runs/8989360201>

There is a [bug in Clang 18](llvm/llvm-project#81849) that causes issues when building for Arm64 in later parts of the build (specifically `libgit2`). As a workaround, we will still use the pre-built Clang to build LLVM but will use MSVC for the rest of the Arm64 build.

Author: bors