Feature/safo6 nrl 721 seed sandbox data

[sandyforresternhs]

• Deletes all items in a DynamoDB table and reseeds the table with X (default = 2) pointers of each type for X (default is 2) custodians
• The scripts have been implemented to allow for execution either locally or via the lambda
• Here's some Cloudwatch logs showing the lambda working successfully
• When running locally, the delete_all_table_items.py and seed_sandbox_table.py scripts can be run independently or via the orchestrator script reset_sandbox_table.py
• The lambda handles the orchestration of the delete and seed scripts (index.py), so the reset_sandbox_table.py script is not required for the lambda
• The clone_dynamodb_table.py is not required as part of this work, but I used it testing. We can leave it in or take it out depending on how useful people feel it is

TODO / Questions

• What needs adding for the retrieval mechanism
• Update readme
• Review / update the customer facing docs - sense check the examples line up with the pointers we're creating
• Sense check what we're doing here lines up with Nina's work to amend NHS numbers in the docs

[sonarqubecloud]

Quality Gate passed

Issues
9 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

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