Run the tests with a remote dest store

Dependencies

• [2] 4WLW4VHS Test setup: support arbitrary hydra config
• [*] HX4QYOYA add first evaluations tests

Change contents

• edit in t/lib/Setup.pm at line 57
  [2.1026]

  [2.1026]
  + print $fh "store_uri = file:$dir/nix/dest-store\n";