test(smoketest): add additional s3 impl options

[andrewazores]

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Related to #67

To test:

$ USE_USERHOSTS=false ./smoketest.bash -bs cloudserver
$ USE_USERHOSTS=false ./smoketest.bash -bs seaweed
$ USE_USERHOSTS=false ./smoketest.bash -bs localstack
$ USE_USERHOSTS=false ./smoketest.bash -bs minio

All four of these should spin up and result in a working deployment with the same basic Cryostat functionalities. Minio will additionally open its admin console/file explorer.

[andrewazores]

@aali309 @mwangggg ping

[aali309]

LGTM, all 4 tests work as expected.