[Backport release-25.11] archisteamfarm: rename, move to by-name

[nixpkgs-ci]

Bot-based backport to release-25.11, triggered by a label in #485695.

Before merging, ensure that this backport is acceptable for the release.

Even as a non-committer, if you find that it is not acceptable, leave a comment.

Tip

If you maintain all packages touched by this pull request, and they are all located under pkgs/by-name/*, you can comment @NixOS/nixpkgs-merge-bot merge to automatically merge this PR using the nixpkgs-merge-bot.

[gepbird]

Why are we backporting the rename? Adding an eval warning sounds like a slightly breaking change.

[mdaniels5757]

Didn't notice/see your comment! Yeah, agreed.

[SuperSandro2000]

Why are we backporting the rename? Adding an eval warning sounds like a slightly breaking change.

Because the software talks to online services, so all updates, including breaking ones, need to be backported as it otherwise does not properly function. Excluding the rename would require me to do backports manually for which I do not have the time to allocate.

Also, warnings are just warnings. Nothing happens if you ignore them completely.

yeah, yeah, intended change

[MattSturgeon]

Why are we backporting the rename? Adding an eval warning sounds like a slightly breaking change.

Agreed. I'm fine backporting the alias (which is still breaking for anyone using allowAliasee = false), but I'd rather avoid backporting warnings unless they're actually necessary on stable.

Only diff is the missing warning (intended)