tmt: Fix install tests to use booted image to avoid bootupd skew

The install-outside-container and install-unified-flag tests were
failing because they pulled centos-bootc:stream10 which has a newer
bootupd with EFI files at /usr/lib/efi/, while the running Fedora
image has the old layout at /usr/lib/bootupd/updates/EFI/.

Use the booted image instead to ensure bootupd versions match.
The original code is commented out for easy reversion once PR #1816
lands to properly handle cross-version installs.

Assisted-by: OpenCode (Claude Sonnet 4)
Signed-off-by: Colin Walters <walters@verbum.org>

Author: cgwalters

tmt/tests/booted/test-install-outside-container.nu

@@ -6,11 +6,12 @@
 use std assert
 use tap.nu
 
-# In this test we install a generic image mainly because it keeps
-# this test in theory independent of starting from a bootc host,
-# but also because it's useful to test "skew" between the bootc binary
-# doing the install and the target image.
-let target_image = "docker://quay.io/centos-bootc/centos-bootc:stream10"
+# FIXME: Revert to use generic images once https://github.com/bootc-dev/bootc/pull/1816 lands
+# Currently using the booted image to avoid version skew between bootupd in
+# the running system and the target image (e.g., different EFI file layouts).
+# let target_image = "docker://quay.io/centos-bootc/centos-bootc:stream10"
+bootc image copy-to-storage
+let target_image = "containers-storage:localhost/bootc"
 
 # setup filesystem
 mkdir /var/mnt

tmt/tests/booted/test-install-unified-flag.nu

@@ -11,9 +11,12 @@
 use std assert
 use tap.nu
 
-# Use a generic target image to test skew between the bootc binary doing
-# the install and the target image
-let target_image = "docker://quay.io/centos-bootc/centos-bootc:stream10"
+# FIXME: Revert to use generic images once https://github.com/bootc-dev/bootc/pull/1816 lands
+# Currently using the booted image to avoid version skew between bootupd in
+# the running system and the target image (e.g., different EFI file layouts).
+# let target_image = "docker://quay.io/centos-bootc/centos-bootc:stream10"
+bootc image copy-to-storage
+let target_image = "containers-storage:localhost/bootc"
 
 def main [] {
     tap begin "install with experimental unified storage flag"