[storages] Do not add a temporary suffix to S3 keys by default

4 jobs for topic/default/optional-upload-prefix in 1 minute and 52 seconds (queued for 27 seconds)
Status Name Job ID Coverage
  Test
passed check_manifest #183866

00:00:21

passed flake8 #183867

00:00:22

passed py27 #183868

00:01:40

passed py3 #183869

00:01:50