(main) Remove symlinks from acceptance harness

Git's cross platform handling of symlinks is problematic on windows, and
the symlinks are also causing problems in third party software like
Eclipse.  This commit removes them, and instead is explicit about which
pre-suite steps are executed, in what order, in the
config/{git,packages}/options.rb files.
Merge pull request #2205 from jpartlow/maint/master/remove-acceptance-symlinks

(main) Remove symlinks from acceptance harness