[R] R bindings fail to build on WinARM

[jeroen]

Describe the bug, including details regarding any error messages, version, and platform.

See https://github.com/r-universe/cran/actions/runs/29991693952/job/89157083157

The problem is that it is using static libs for win x64:

** using staged installation
  *** pkg-config found.
  trying URL 'https://github.com/apache/arrow/releases/download/apache-arrow-25.0.0/r-libarrow-windows-x86_64-25.0.0.zip'

Sadly Sys.setenv("LIBARROW_BINARY" = FALSE) does not seem to work on Windows either.

Component(s)

R

[thisisnic]

I'm not sure this is a bug, I think it's just that we don't currently support WinARM. Looking at #43401 which was closed as stale as there wasn't any interest in it, and it's not clear if we're able to support it at the moment (things maybe have moved on with rtools since then, though I'm unsure).