Upgrade AWS SDK v1 to v2

[otrosien]

Description

According to AWS, the v1 SDK will only be supported until the end of 2025. Raising awareness so this can be tackled in a timely manner.

• https://aws.amazon.com/blogs/developer/announcing-end-of-support-for-aws-sdk-for-java-v1-x-on-december-31-2025/

[elasticsearchmachine]

Pinging @elastic/es-distributed-coordination (Team:Distributed Coordination)

[DaveCTurner]

Thanks @otrosien, yes you're right. We're already working on this.