fix wrong target-redifect links in topbar release list partial

[syphar]

So, I think this is the fix for #2922.

Initially thought this has to be an issue with our search-fallback logic (web::rustdoc::path_for_version).

But then I found our that the version redirect links are generated wrong.

We have this page in the issue: https://docs.rs/toml/0.5.11/src/toml/de.rs.html. The expected version-links in the topbar should be https://docs.rs/crate/toml/0.9.6/target-redirect/x86_64-unknown-linux-gnu/src/toml/de.rs.html, but they are https://docs.rs/crate/toml/0.9.6/target-redirect/x86_64-unknown-linux-gnu/toml/toml/de.rs.html.

See the difference?

Generally this seems to be a regression from one of #2355, #2113 or something else.

Looking deeper I found an oddness, but not yet how that happened to me:

There is only one place where the /menus/releases/ partial is loaded, which is the topbar. And there it's only loaded when we have docs. So, if I'm not missing something, there is no place where the partial is loaded without target or without inner-path. So IMO quite a bit of the complexity in get_all_releases can be removed.

The changed tests are for things I believe that also can't happen in prod.

Or am I missing something?

[GuillaumeGomez]

Seems good to me.

[syphar]

Seems good to me.

I hope so :)

if not, we know what to revert :)