Support reading of old image for delete events on DynamoDB source

[graytaylor0]

Is your feature request related to a problem? Please describe.
As a user of the DynamoDB source using a custom document_id or document_version from my DynamoDB items, I am not able to keep deletions on my DDB table in sync with OpenSearch, because Data Prepper only reads the newImage of DDB stream records, and does not write the old image

Describe the solution you'd like
A new parameter under the stream block of DDB source

source:
  dynamodb:
    stream:
      use_old_image_for_deletes: true

When this is set to true, Data Prepper would check stream records for the REMOVE action, and then it would construct the Event from the old image, rather than the new empty image.

Describe alternatives you've considered (Optional)
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[dlvenable]

We changed this to view_on_remove: OLD_IMAGE to potentially support other configurations. See the following thread:

#4275 (comment)