This block of code already wraps file operations with
`SharedHelpers.filesystem_access`, which rescues and re-raises more
friendly errors. Also, I'm not fully sure creating a temporary directory
can end up raising an `Errno::EACCES` error from reading `tmpdir`
sources. Finally, this rescue block apparently leads to some false
positives when firewall is blocking the ruby executable on Windows, or
at least that's what we've got reported.

In any case, I think it's best to let the original error be raised.

https://github.com/rubygems/rubygems/commit/f7dbe54404