The hadoop test passes for me locally but fails in CI, so this should give some extra debugging information (my user acct doesn't have permissions to read the dataproc logs from the failing test).
WIP for now because I want to make sure this method of reading the logs works.
* add extra wait for storage bucket object deletion
* make timeout for object deletion 5 minutes, make it succeed 3 times
* delete the cluster before deleting the bucket
* deprecate delete_autogen_bucket
* improve deprecation message
