Bug: Fix e2e tests in Idempotency Redis persistent storage

[leandrodamascena]

Expected Behaviour

In this PR #5251 we introduced new tests in the Idempotency utility, but Redis is failing because it needs a proper connection handler.

Current Behaviour

Error

FAILED tests/e2e/idempotency_redis/test_idempotency_redis.py::test_response_hook_idempotency - RuntimeError: Function failed invocation: {"errorMessage": "Failed to save in progress record to idempotency store - (Parameter validation failed:\nInvalid length for parameter TableName, value: 0, valid min length: 1)", "errorType": "IdempotencyPersistenceLayerError", "stackTrace": ["  File \"/opt/python/aws_lambda_powertools/middleware_factory/factory.py\", line 137, in wrapper\n    response = middleware()\n", "  File \"/opt/python/aws_lambda_powertools/utilities/idempotency/idempotency.py\", line 101, in idempotent\n    return idempotency_handler.handle()\n", "  File \"/opt/python/aws_lambda_powertools/utilities/idempotency/base.py\", line 124, in handle\n    return self._process_idempotency()\n", "  File \"/opt/python/aws_lambda_powertools/utilities/idempotency/base.py\", line 150, in _process_idempotency\n    raise IdempotencyPersistenceLayerError(\n"]}
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### Code snippet

```python
No snippet

Possible Solution

Fix tests

Steps to Reproduce

Run e2e tests

Powertools for AWS Lambda (Python) version

latest

AWS Lambda function runtime

3.12

Packaging format used

Lambda Layers

Debugging logs

No response

[github-actions]

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[github-actions]

This is now released under 3.1.0 version!