Project: fix DELETE route

Dependencies

• [2] CUFVKLLA Remove Hydra::Helper::nix::txn_do from the Perl code
• [3] FPK5LF53 * Put the project-related actions in a separate controller. Put the
• [4] DAPOSS44 Use the REST API in the web interface for editing projects
• [5] AWMM5OGV Use delete instead of delete_all

Change contents

• replacement in src/lib/Hydra/Controller/Project.pm at line 81
  [2.445]→[3.355:406](∅→∅),[3.503]→[3.355:406](∅→∅)
  − $c->stash->{project}->jobsetevals->delete;
  [2.445]

  [3.406]
  + $c->stash->{project}->jobsets->delete;