Cluster API: Support data loading from MongoDB and DynamoDB

[amotl]

About

Hi there. We'd like to add support for data loading from MongoDB and DynamoDB through CrateDB Cloud ETL to CrateDB Toolkit's I/O subsystem, effectively its ctk load table interface, like it works for file-based resources already.

In the patch referenced below, we can spot a import_jobs_create_from_dynamodb function has been added to accompany DynamoDB, and from the patch I can also easily learn about relevant job attributes. Thanks!

@juanpardo: In this spirit, may I also ask you to point out the relevant spot where I can educate myself about corresponding MongoDB semantics and properties?

References

• https://cratedb-toolkit.readthedocs.io/cluster/
• https://cratedb-toolkit.readthedocs.io/io/
• Added support for DynamoDB data jobs croud#597