tests: Adapt for newer nushell

It looks like the default `column1` became `column0` which
broke this. But really we don't need a table, we just need a list;
and piping to `from csv` was a weird way to go about splitting
lines into a list.

Change the assertion to just expect a list which simplifies
the code.

Signed-off-by: Colin Walters <walters@verbum.org>

tests/booted/test-logically-bound-install.nu

@@ -8,17 +8,17 @@ let expected_images = [
     "registry.access.redhat.com/ubi9/podman:latest" # this image is signed
 ]
 
-def validate_images [images: table] {
+def validate_images [images: list<string>] {
     print $"Validating images ($images)"
     for expected in $expected_images {
-        assert ($images | any {|item| $item.image == $expected})
+        assert ($expected in $images)
     }
 }
 
 # This test checks that bootc actually populated the bootc storage with the LBI images
 def test_logically_bound_images_in_storage [] {
     # Use podman to list the images in the bootc storage
-    let images = podman --storage-opt=additionalimagestore=/usr/lib/bootc/storage images --format {{.Repository}}:{{.Tag}} | from csv --noheaders | rename --column { column1: image }
+    let images = podman --storage-opt=additionalimagestore=/usr/lib/bootc/storage images --format {{.Repository}}:{{.Tag}} | split row "\n"
 
     # Debug print
     print "IMAGES:"
@@ -30,7 +30,7 @@ def test_logically_bound_images_in_storage [] {
 # This test makes sure that bootc itself knows how to list the LBI images in the bootc storage
 def test_bootc_image_list [] {
     # Use bootc to list the images in the bootc storage
-    let images = bootc image list --type logical --format json | from json
+    let images = bootc image list --type logical --format json | from json | get image
 
     validate_images $images
 }