Commit c6f2f016 added an explicit check for a Windows "junction point".
That turned out to be needed only because get_dirent_type() was busted
on Windows. It's been fixed by commit 9d3444dc, so remove it.
Add a TAP-test to demonstrate that in-place tablespaces are copied by
pg_basebackup. This exercises the codepath that would fail before
c6f2f016 on Windows, and shows that it still doesn't fail now that we're
using get_dirent_type() on both Windows and Unix.
Back-patch to 15, where in-place tablespaces arrived and caused this
problem (ie directories where previously only symlinks were expected).
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/CA%2BhUKGLzLK4PUPx0_AwXEWXOYAejU%3D7XpxnYE55Y%2Be7hB2N3FA%40mail.gmail.com
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