Migration from mu released to mu unreleased

Add upragde autoyast profile and yaml schedule files for migration from
mu released to mu unreleased testsuites.

schedule/yast/maintenance/migration_to_mu_unrelease.yaml

@@ -0,0 +1,32 @@
+---
+name: migration_to_mu_unreleased
+description: >
+  Performs a migration from system with released maintenance updates to a product with maintenance updates unreleased
+schedule:
+  - migration/version_switch_origin_system
+  - boot/boot_to_desktop
+  - migration/record_disk_info
+  - migration/reboot_to_upgrade
+  - migration/version_switch_upgrade_target
+  - installation/bootloader
+  - installation/welcome
+  - installation/upgrade_select
+  - installation/scc_registration
+  - installation/add_update_test_repo
+  - installation/addon_products_sle
+  - installation/resolve_dependency_issues
+  - installation/installation_overview
+  - installation/disable_grub_timeout
+  - installation/start_install
+  - installation/await_install
+  - installation/logs_from_installation_system
+  - installation/reboot_after_installation
+  - installation/grub_test
+  - installation/first_boot
+  - migration/post_upgrade
+  - console/consoletest_setup
+  - console/zypper_lr
+  - console/zypper_ref
+  - boot/grub_test_snapshot
+  - migration/version_switch_origin_system
+  - boot/snapper_rollback

schedule/yast/maintenance/register_image.yaml

@@ -0,0 +1,9 @@
+name: register_image_for_migration_mu_jobs
+description:    >
+  Boot an image and register it for migration MU jobs.
+schedule:
+  - installation/bootloader_start
+  - boot/boot_to_desktop
+  - migration/online_migration/register_system
+  - shutdown/grub_set_bootargs
+  - shutdown/shutdown