Currently, GCS is supported but only by using the hadoop connector
The objective of this improvement is to add support for checkpointing to Google Cloud Storage with the Flink File System,
This would allow the `gs://` scheme to be used for savepointing and checkpointing. Long term, it would be nice if we could use the GCS FileSystem as a source and sink in flink jobs as well.
Long term, I hope that implementing a flink native GCS FileSystem will simplify usage of GCS because the hadoop FileSystem ends up bringing in many unshaded dependencies.