Add DynamoDB to Java serving

[michelle-rascati-sp]

Is your feature request related to a problem? Please describe. Java serving currently only supports Redis.

Describe the solution you'd like I would like to add DynamoDB as an option for the online feature store to the Java implementation.

[woop]

@michelle-rascati-sp Please let us know if there is anything we can help with here.

[stale[bot]]

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