Data Loading from GCS

[shivajid]

It would be good to have data loading support from GCS

• WebDataSet Pipeline

A similar conversion of C4 TFRecords to WebDatasets or a more sequential file access format to let users plug in different datasets.

[miladm]

@tengyifei to share his thoughts on the value of this feature. I'm not convinced we need to incorporate many options yet. Curious to gather more input.