Fix link and cleanup

[sawsa307]

• Rename cleanup_all.sh to cleanup-all.sh and fix broken ref.
• Add instructions to check if directory is included in recipe_test.go
• Run cleanup-all after all tests when running in prow
  • We want to make sure the resources always get properly cleanup. For a given test, cleanup.sh is not run if there is failure in preceding script(setup.sh or cleanup.sh).