python3Packages.pydicom: add missing setuptools runtime dependency

[bcdarwin]

Motivation for this change

Missing dependency, not previously detected due to #133032.

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/)
• 21.11 Release Notes (or backporting 21.05 Release notes)
  • [NA] (Package updates) Added a release notes entry if the change is major or breaking
  • [NA] (Module updates) Added a release notes entry if the change is significant
  • [NA] (Module addition) Added a release notes entry if adding a new NixOS module
  • [NA] (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[fabaff]

Result of nixpkgs-review pr 147930 run on x86_64-linux 1

4 packages marked as broken and skipped:

• python38Packages.nipype
• python38Packages.pybids
• python39Packages.nipype
• python39Packages.pybids

2 packages failed to build:

• python38Packages.nilearn
• python39Packages.nilearn

17 packages built:

• expliot
• intensity-normalization (python39Packages.intensity-normalization)
• python38Packages.dicom2nifti
• python38Packages.dipy
• python38Packages.intensity-normalization
• python38Packages.nibabel
• python38Packages.nipy
• python38Packages.nitime
• python38Packages.pydicom
• python38Packages.pynetdicom
• python39Packages.dicom2nifti
• python39Packages.dipy
• python39Packages.nibabel
• python39Packages.nipy
• python39Packages.nitime
• python39Packages.pydicom
• python39Packages.pynetdicom

[fabaff]

Looks good to me. nilearn failure is not new.

[fabaff]

nilearn failure will be addressed with #147936