Change package target for run_migration

Provide run_migration with suse-migration-pre-checks
This allows to simplify the suse-migration-rpm package
to provide only an image binary and not any python
specific code. The suse-migration-rpm now only manages
dependencies and provides the image binary

package/suse-migration-services-spec-template

@@ -172,7 +172,6 @@ install -D -m 755 tools/migrate \
 # need for use of the "standard" systemd service handling macros.
 
 %files
-%{_sbindir}/run_migration
 %{_bindir}/suse-migration-ssh-keys
 %{_bindir}/suse-migration-mount-system
 %{_bindir}/suse-migration-post-mount-system
@@ -208,6 +207,7 @@ install -D -m 755 tools/migrate \
 %{python_sitelib}/*
 
 %files -n suse-migration-pre-checks
+%{_sbindir}/run_migration
 %{_bindir}/suse-migration-pre-checks
 %{_unitdir}/suse-migration-pre-checks.service