try to fix performance report test to use correctly terminated assignments

2 jobs for features/try_cleanup_assignement_and_assignement_log in 32 minutes and 8 seconds (queued for 9 seconds)
Status Job ID Name Coverage
  Test
failed #27229
test

00:32:08

failed #27225
test

00:38:05

 
Name Stage Failure
failed
test Test
Expected false to be truthy.

bin/rails test test/system/assignment_termination_index_test.rb:118

................................................

Finished in 1876.164622s, 0.1301 runs/s, 0.6060 assertions/s.
244 runs, 1137 assertions, 1 failures, 0 errors, 0 skips
ERROR: Job failed: error executing remote command: command terminated with non-zero exit code: Error executing in Docker Container: 1