[8.18] bump beats and buildkite setup

[moukoublen]

Summary of your changes

Backport #3347
and bump beats to use the new crosbuild images.

beat was bumped with

go get github.com/elastic/beats/[email protected]

Screenshot/Data

Related Issues

Checklist

• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary README/documentation (if appropriate)

Introducing a new rule?

• Generate rule metadata using this script
• Add relevant unit tests
• Generate relevant rule templates using this script, and open a PR in elastic/packages/cloud_security_posture