[clang] [lit] Are all RUN lines skipped in windows cmd? (PR #65242)

[Vlad Serebrennikov via cfe-commits]

Endilll wrote:

> When I install Visual Studio, it creates a widget that brings up a cmd shell with the right environment. I'm not aware of a similar widget for PowerShell.

At least in VS 2022, there is a `Developer PowerShell for VS 2022` in Start menu beside the usual `x64 Native Tools Command Prompt for VS 2022`. It was there in 2019, but IIRC dropped you into x86 toolchain.

https://github.com/llvm/llvm-project/pull/65242