@kapa.ai improve performance source s3 connector

Improving the performance of the Source S3 connector in Airbyte can be achieved through various methods. Here are some insights based on the knowledge sources provided: 1. Concurrency: One of the ways to improve the performance of the S3 connector is by leveraging concurrency. A proof of concept (PoC) was discussed in a [Github issue](https://github.com/airbytehq/airbyte/issues/31217) where the goal was to confirm performance improvements on the S3 connector by using the concurrent CDK (Cloud Development Kit). 2. Refactoring: The PoC also suggested refactoring the DefaultFileBasedStream (and AbstractFileBasedStream) to extend from AbstractStream, implementing partition and partition generator types specific to file-based. This could potentially improve the performance by leveraging the concurrent CDK from the file CDK. 3. IAM role-based authentication: The S3 Source now supports [IAM role-based authentication](https://github.com/airbytehq/airbyte/pull/33818), which can provide more granular control over permissions and eliminate the need for managing static access keys. This might not directly improve performance, but it can streamline the process and make data transfer more efficient. Please note that these are potential ways to improve performance based on the information available. The actual impact might vary depending on the specific use case and environment. It's recommended to test these methods in a controlled environment before implementing them in a production setting.