Update golang version in logstash container images

[donoghuc]

The official docker images repo bumped golang from 1.23 to 1.25 docker-library/official-images#19675

This is causing failures in CI for the official-images repo https://github.com/docker-library/official-images/actions/runs/17293485655/job/49086056098?pr=19773

We should bump the version of golang to 1.25 for logstash images.

Note the image source here https://github.com/elastic/dockerfiles/blob/b46babf05ef3b69ceb315ecea69b1c514fc6551e/logstash/Dockerfile#L5 as well as the go images in the logstash repo: https://github.com/elastic/logstash/blob/91a9527e56c394a224da7c715984a76e68eb1e66/docker/templates/Dockerfile.erb#L23C20-L37

[donoghuc]

Addressed by #18083