[R] Add Rocky and opensuse to the allowlist for libarrow binaries

[jonkeane]

Describe the enhancement requested

We already have a few distros where we allow the download of binaries of libarrow by default should we add rocky and opensuse-leap to these?

This came up when talking to the Posit Package Manager team which run those and they were a little surprised that these don't download binaries, but ubuntu does. I don't believe these flavors of linux are checked by CRAN, so we should be ok to add them.

Component(s)

R

[nealrichardson]

Yep, seems safe to just do.