Add a property for PackageBase class related to wrappers

I had to fix one issue for the dev release and found some checks that should be changed.

Related to https://earth.bsc.es/gitlab/es/autosubmit/-/merge_requests/525/diffs?commit_id=866119c6ba070ab9b006fa82a45b320c4cca9e19

The idea is to add the @property, package.contains_a_wrapper to substitute some band-fixes comparations that rely on the package.name being set.

How to reproduce the error:

Try to add a package.name to the PackageSimple.__init__ class and run the testing suite