Windows bindists are quite broken

mingw32 binary distributions are currently quite broken:

$ wget https://gitlab.haskell.org/ghc/ghc/-/jobs/1805153/artifacts/raw/ghc-x86_64-windows-release.tar.xz
$ tar -xf ../ghc-x86_64-windows-release.tar.xz
$ cd ghc-9.10.0.20240310-x86_64-unknown-mingw32/
$ bin/ghc --info
ghc-9.10.0.20240310.exe: could not detect mingw toolchain in the following paths: ["C:\\msys64\\home\\ben\\tmp\\ghc-9.10.0.20240310-x86_64-unknown-mingw32\\lib\\..\\mingw","C:\\msys64\\home\\ben\\tmp\\ghc-9.10.0.20240310-x86_64-unknown-mingw32\\lib\\..\\..\\mingw","C:\\msys64\\home\\ben\\tmp\\ghc-9.10.0.20240310-x86_64-unknown-mingw32\\lib\\..\\..\\..\\mingw"]

It appears that many things that should be in the root of the binary distribution are instead now in lib (including mingw/):

$ ls lib/
a.exe       config.guess  config.status        default.host.target.in        doc             ghc-usage.txt  install-sh   llvm-targets  mk              README          x86_64-windows-ghc-9.10.0.20240310
bin         config.log    config.sub           default.target                docs-utils      html           latex        Makefile      package.conf.d  settings
build.mk    config.mk     configure            default.target.ghc-toolchain  ghc-interp.js   include        lib          manpage       post-link.mjs   template-hsc.h
completion  config.mk.in  default.host.target  default.target.in             ghci-usage.txt  INSTALL        llvm-passes  mingw         prelude.js      wrappers

Moving lib/mingw to the root of the distribution appears to be sufficient to make the compiler functional.