dolt clone command only output is the word 'Killed'

[dcritchfield-threekit]

When trying to clone a large database from a GCS bucket into a pod that has a smaller persistent volume mounted than the bucket size, the clone command hangs with no output until the process eventually outputs the word "Killed" and does not proceed with any download. No other error information is printed.

[timsehn]

This could be related to #5405

[timsehn]

Customer reports this is on a fresh deployment so unlikely related to #5405.

[timsehn]

@reltuk reports that this is an OOM on the receiver host. The receiver host needs to have enough memory to load the dolt database to clone it. This is about 10% of the database size.

The GCS clone code does a download and loads the database before ever printing anything. We should probably make that more use friendly.

[timsehn]

Going to resolve as we can't control what the OS does when it OOMs.