[Update Center] HTTP/404 on /current/updates/*.json* links

[dduportal]

Service(s)

Update center

Summary

While working on #4402, the endpoint /current/updates has been added back (e.g. directory listing instead of HTTP/404).

However, when clicking on any link inside this directory, the user is greeted by a HTTP/404 from mirrorbits.

It make sense as this path does not exist in the mirroring system: it is new since we've added back the symlink.

=> we have to fix this issue at the crawler level (as the update-center2 does not have access to the content of /current/updates data)

Reproduction steps

No response