fix(tvix/castore/import): deal with entry.path() not having a parent r/8077

We got away with not properly dealing with this for the archive case,
where everything is contained inside a toplevel dir, but NARs can encode
a single file/symlink.

Properly break if the IngestionEntry path has the ROOT as parent, and
only create filling directories in the other case.

Change-Id: Ib378d0d1040de7c3fe310912a0b0488c55afee83
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11590
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: Connor Brewster <cbrewster@hey.com>

0 files changed, 0 insertions, 0 deletions