Remove nix from hydra-perl-deps

Dependencies

• [2] QFJ34KD3 include perlPackages.YAML in buildInputs
• [3] Z3JVFE2R Convert all tests to the Python DSL
• [4] 75BCCX2T Get rid of dependency to SQLite
• [5] LYO7KK3J Address PR comments:
• [6] RWNXH3H2 lastModified -> lastModifiedDate
• [7] KPWMZFHZ Add runHydra shell
• [8] CWK6IXBX Re-add DBDSQLite since it's needed by the Perl-bindings of Nix

Change contents

• edit in flake.nix at line 151
  [2.21]→[3.2785:2811](∅→∅),[3.2785]→[3.2785:2811](∅→∅)
  − final.nix
• replacement in flake.nix at line 165
  [3.3208]→[3.3208:3246](∅→∅)
  − perlDeps perl final.nix
  [3.3208]

  [3.3297]
  + final.nix perlDeps perl
• replacement in flake.nix at line 224
  [3.5012]→[3.5012:5052](∅→∅)
  − passthru.perlDeps = perlDeps;
  [3.5012]

  [3.5052]
  + passthru = { inherit perlDeps; inherit (final) nix; };