Migrate AWS code to a new AWS SDK v2 before end-of-support / EOL on July 31, 2025

[rgoltz]

According to this https://aws.amazon.com/blogs/developer/announcing-end-of-support-for-aws-sdk-for-go-v1-on-july-31-2025/, there will be no more releases for AWS SDK for Go v1 after July 2025. AWS as maintainer of this AWS SDK for Go package announced the EOL of the version 1 for July 31, 2025. After this date, there are no critical bug fixes and no security issues provided.

https://github.com/prometheus/alertmanager/blob/b5d1a64ad5bb0ff879705714d1e40cea82efbd5c/go.mod#L9

Prometheus Alertmanager should consider migrating to AWS SDK for Go v2 - https://github.com/aws/aws-sdk-go-v2/ so that we reduce the technical dept and prometheus converges to use a single version of this SDK.

I'm going to link the same topic in other components in the Prometheus ecosystem: https://github.com/prometheus/prometheus/issues/15572 https://github.com/prometheus/sigv4/issues/14

[rapphil]

I would like to work on this.

[rgoltz]

@rapphil - Based on the current go.mod file, we are on v2 already?

[pehlicd]

This is done by #4482

[rgoltz]

This is done by #4482

Thanks a lot ❤️