legacy: migrated files redirection

[kpsherva]

The old URL path should still work and directly link to the file and versions should redirect correctly to the new one.
Double-check all possible URLs path/routes. It looks like that there is some code done here, but it might not take into account URL params (and we should).

from #129

1. Find all the possible instances of MIGRATED in the current CDS, understand how it works
2. prepare code modifications to redirect MIGRATED records also with the entire subpath/query string. Be aware that redirection is already in place for CDS Videos and CLC, and we need to test that we don't break those after the modifications.
3. in CDS-RDM, implement something similar to Zenodo redirector to re-map the incoming redirection from current CDS, transform the URL, and re-redirect the final place. Example of possible final URL this.

We need to take into account the multiple versions of a file.

Have a look to the migration code in cds-migrator-kit.