[8.18](backport #7487) bk(packaging): split arm64 from amd64 workers

[mergify]

What does this PR do?

Split darwin/arm64 from amd64 using the aarch64 host and golang crossbuild.

Uses elastic/golang-crossbuild#533 and elastic/golang-crossbuild#559 (1.24.0)

We can merge this as soon as:

1. This build has successfully been build.
2. the CI for test: golang-crossbuild debian 11 #7304 worked fine!

Why is it important?

Avoid using qemu for creating arm64 on amd64.

Checklist

• I have read and understood the pull request guidelines of this project.
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in ./changelog/fragments using the changelog tool
• I have added an integration test or an E2E test

Disruptive User Impact

How to test this PR locally

In the CI see #7304

Related issues

Questions to ask yourself

• How are we going to support this in production?
• How are we going to measure its adoption?
• How are we going to debug this?
• What are the metrics I should take care of?
• ...

---

This is an automatic backport of pull request #7487 done by [Mergify](https://mergify.com).

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 458a950

cc @v1v

[v1v]

Test

See https://buildkite.com/elastic/elastic-agent-binary-dra/builds/2815 and https://buildkite.com/elastic/elastic-agent-package/builds/4884