[clang] [llvm] workflows/release-binaries: Use Wix to create Windows installer (PR #200734)

[John Doe via cfe-commits]

marakew wrote:

@tstellar I'd like an archive without additional libraries for developers.
Downloading 1GB isn't really practical.
I like @zmodem builds, but one day it might stop creating them.
So I'd like these builds to be created automatically.
A release candidate has just been released: https://github.com/llvm/llvm-project/releases/tag/llvmorg-23.1.0-rc3.
Where the MSI is 780MB, which is too much compared to @zmodem builds for previous versions of LLVM-22.1.8-win64.exe.
Only 434 MB.

https://github.com/llvm/llvm-project/pull/200734