vfs_fruit: filter out AFP_AfpInfo streams with pending delete-on-close

vfs_fruit: filter out AFP_AfpInfo streams with pending delete-on-close

This is in preperation of fixing the implementation of removing the
AFP_AfpInfo stream by zeroing the FinderInfo out.

We currently remove the stream blob from the underyling filesystem
backing store, but that results in certain operations to fail on any
still open file-handle.

The fix comes in the next commit which will convert to backing store
delete operation to a set delete-on-close on the stream.

This commit adds filtering on streams that have the delete-on-close
set. It is only needed for the fruit:metadata=stream case, as with
fruit:metadata=netatalk the filtering is already done in
fruit_streaminfo_meta_netatalk().

Bug: https://bugzilla.samba.org/show_bug.cgi?id=13181

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>