Google Cloud Storage loader

[respondersGY]

Load GCS object as target.

target-info gcs://<TARGET>.E01
target-info gcs://<TARGET>.tar
target-info gcs://<TARGET>.zip

References

• https://cloud.google.com/python/docs/reference/storage/latest
• Add Google Cloud Storage Adapter flow.record#84

[Schamper]

I think you can get away with just having a loader component, but maybe it'd be nice to have a filesystem implementation too.