Improve cleanup in fuzzing harnesses

5 jobs for master in 2 minutes and 47 seconds (queued for 30 seconds)
Status Name Job ID Coverage
  Build
passed build:lib #22601
docker

00:01:43

 
  Test
passed test:lib #22602
docker

00:01:04

 
  Trigger
passed trigger:android

passed trigger:javascript

passed trigger:python