Install configuration and answer file migrations
Kafo supports migration scripts for config and answer files when using scenarios, so since foreman-installer was migrated to these in #10369, the project should have a directory for them and should install them.
https://github.com/theforeman/kafo#updating-scenarios has more info.
Migrations should be created when adding classes (plugins) and changing some important default values.
fixes #14475 - add and install config file migrations
To keep the migration files and applied file meeting packaging standards
they're symlinked into place, using this layout:
Includes migrations for current 1.10-stable to develop changes.