[9.0](backport #43280) bk(packaging): use arm64 for darwin/arm64

[mergify]

Proposed commit message

Golang Crossbuild:

• for arm64 let's use the aarch64 host
• for amd64 let's use the amd64 host

We changed partially for aarch64, but darwin/arm64 was not changed.

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

Checklist

• 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.next.asciidoc or CHANGELOG-developer.next.asciidoc.

Disruptive User Impact

Author's Checklist

• [ ]

How to test this PR locally

In the CI:

• https://buildkite.com/elastic/beats-packaging-pipeline/builds/2867

See #43145

Related issues

Requires elastic/golang-crossbuild#533

Use cases

Screenshots

Logs

---

This is an automatic backport of pull request #43280 done by [Mergify](https://mergify.com).

[botelastic]

This pull request doesn't have a Team:<team> label.