snapshot test for return values on condition check failure

[giograno]

Motivation

This PR arises from #9040.

When an operation (e.g., PutItem or DeleteItem) fails on DDB due to a conditional check, we can ask to receive back the items that failed the check with the ReturnValuesOnConditionCheckFailure set to ALL_OLD.
This feature was implemented in DynamoDBLocal version 2.2.0, released in December 2023, so we can now support it out of the box. This PR simply adds a snapshot test to verify the behavior.

Changes

• Adding a snapshot test to verify we return a set of items when ReturnValuesOnConditionCheckFailure is set to ALL_OLD.

[github-actions]

LocalStack Community integration with Pro

    2 files      2 suites   1h 14m 3s ⏱️
2 431 tests 2 205 ✅ 226 💤 0 ❌
2 432 runs  2 205 ✅ 227 💤 0 ❌

Results for commit cfa8120.

♻️ This comment has been updated with latest results.

[coveralls]

coverage: 84.032% (+0.01%) from 84.022%
when pulling cfa8120 on ddb-condition-check-on-failure
into 7548ba6 on master.

[viren-nadkarni]

Thanks for adding this @giograno!