base_image: fix missing guestfs_distro_source_and_dest_file in yaml output

The GUESTFS_DISTRO_SOURCE_AND_DEST_FILE kconfig variable was missing
the "output yaml" directive, causing it to be defined in .config but
not exported to extra_vars.yaml that Ansible actually consumes.

This resulted in the variable being undefined in Ansible templates:
  jinja2.exceptions.UndefinedError: 'target_dir' is undefined
  TypeError: expected str, bytes or os.PathLike object, not AnsibleUndefined

The issue only manifested on some machines due to different Ansible
execution contexts - the variable was in .config but missing from
extra_vars.yaml where templates expect it.

Fixed by adding "output yaml" to GUESTFS_DISTRO_SOURCE_AND_DEST_FILE
kconfig definition, ensuring proper variable export to Ansible.

Generated-by: Claude AI
Signed-off-by: Daniel Gomez <[email protected]>

Author: dkruces

kconfigs/Kconfig.guestfs

@@ -60,6 +60,7 @@ config GUESTFS_COPY_SOURCES_FROM_HOST_TO_GUEST
 config GUESTFS_DISTRO_SOURCE_AND_DEST_FILE
 	string
 	depends on GUESTFS_COPY_SOURCES_FROM_HOST_TO_GUEST
+	output yaml
 	default "/etc/apt/sources.list" if GUESTFS_DEBIAN
 
 endif

playbooks/roles/base_image/templates/virt-builder.j2

@@ -7,6 +7,7 @@ copy-in {{ kdevops_custom_yum_repofile }}:/etc/yum.repos.d
 {% endif %}
 
 {% if guestfs_copy_sources_from_host_to_guest %}
+{% set target_dir = guestfs_distro_source_and_dest_file | dirname %}
 mkdir {{ target_dir }}
 copy-in {{ guestfs_distro_source_and_dest_file }}:{{ target_dir }}
 {% endif %}