Implement the source connector for s3

### Description

The sink was implemented as per this issue: https://github.com/apache/iggy/issues/2956, however we have yet to implement the s3 source using `aws-sdk-s3`: https://github.com/apache/iggy/issues/2956#issuecomment-4085108019

We can implement this and keep the separate connector for OpenDAL.

### Affected area / component

Connectors

### Proposed solution

_No response_

### Alternatives considered

_No response_

### Contribution

- [x] I'm willing to submit a pull request to implement this feature

### Good first issue

- [x] I think this could be a good first issue for a new contributor