rocfft: split base outputs for hydra

[Madouura]

Description of changes

Tracking: #197885
Last thing I can do before giving up on trying to get this to cache on hydra.
Technically I can have rocfft build twice, but then we'd have to do the same for composable_kernel, which I've learned is just barely under the output limit.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.05 Release Notes (or backporting 22.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[Madouura]

It built hipfft and I'm not rebuilding torch again, so consider nixpkgs-review checked please.
Ended up having to build torch for different reasons, upcoming post will cover nixpkgs-review.

[Madouura]

ofborg failing seems to be nixpkgs-wide at the moment and does not seem to be related to this PR.
Having ofborg redo the checks should fix this once the root problem is fixed.

[Madouura]

Result of nixpkgs-review pr 214606 run on x86_64-linux 1

3 packages built:

• hipfft
• python310Packages.torchWithRocm
• rocfft

[Flakebi]

Do the intermediate rf-zero..rf-three derivations have an purpose left?

Anyway, LGTM, it’s worth a try.

[Madouura]

I honestly don't know, not getting much help from those with more know-how on the matter so this was more or less the last spaghetti noodle I could throw at the wall and see if it stuck.

[SuperSandro2000]

@ofborg eval