Extend bulk-data homepage to show more entries

The relay bulk data export is only showing the first 1k files: https://flashbots-boost-relay-public.s3.us-east-2.amazonaws.com/index.html

This is because the AWS S3 XML only serves that many entries per page.

Task: Update https://github.com/flashbots/mev-boost-relay/blob/main/static/s3/index.html to either have pagination or simply query as many pages as there are (maybe listing in reverse order?)