Tests: Extend symlink-related archive tests to cross-platform

Use `cmake -E create_symlink` or `file(CREATE_LINK)` as appropriate
instead of `ln -sf` on UNIX only to extend cases of (a) symlinks inside
archives and (b) archive extraction to a directory symlink to non-UNIX
platforms where either of these modes may be supported.

The latter relies on the NEW behavior of CMP0205 as it uses
`COPY_ON_ERROR` for platforms where directory symlinks aren't
supported.

Issue: #27756