fix(tvix/boot/tests): check nar-bridge being fully up r/8410

Ensure nar-bridge is healthy before connecting to it, don't just check
for the unix socket to be present.

We don't have a proper /health endpoint yet, but nix-cache-info works
fine for now.

Change-Id: I22df2c3b7bffcf52dbd3d00f3ba5382dc06ab03d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12030
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: yuka <yuka@yuka.dev>
Tested-by: BuildkiteCI

0 files changed, 0 insertions, 0 deletions