Maintenance: add missing tests to `DynamoDBProvider`

[dreamorosi]

Summary

Now that #1222 has been merged and that DynamoDBProvider accepts a custom AWS SDK client, we need to update the integration (e2e) tests already implemented to include this feature.

The tests were introduced in #1244 where tests number 7 & 8 were already defined, but were blocked due to the missing feature added in #1222.

This issue captures the work package needed to introduce these two aforementioned tests.

Why is this needed?

To improve the test coverage of the provider/utility.

Which area does this relate to?

Tests, Parameters

Solution

No response

Acknowledgment

• This request meets Lambda Powertools Tenets
• Should this be considered in other Lambda Powertools languages? i.e. Python, Java