fix(tvix/glue/import): builtins.storeDir fixes r/8808

This didn't support store paths with a subpath joined to them, while
Nix does.

Use state.path_exists, which does. This also means we can drop the
`store_path_exists` helper, which was only used here.

Change-Id: I918ccb270f64acbdc41cb4d2a9c3c5871ce15002
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12618
Tested-by: BuildkiteCI
Reviewed-by: Ilan Joselevich <personal@ilanjoselevich.com>
Reviewed-by: Jörg Thalheim <joerg@thalheim.io>
Autosubmit: flokli <flokli@flokli.de>

0 files changed, 0 insertions, 0 deletions