test: golang-crossbuild debian 11

[v1v]

Test elastic/golang-crossbuild#533

Buildkite pipelines

• See https://buildkite.com/elastic/elastic-agent-binary-dra/builds/2633 for the DRA packaging. [only accessible by Elastic employees]. See staging and snapshot reports (DRA didn't fail. Hence the artefacts are the ones that are needed).
• See https://buildkite.com/elastic/elastic-agent-package/builds/4680 for the DRA packaging. [only accessible by Elastic employees]. See the snapshot report (DRA didn't fail. Hence the artifacts are the ones that are needed).
• See the GH checks in this PR

---

The below BK builds are using elastic/golang-crossbuild#559:

https://buildkite.com/elastic/elastic-agent-package/builds/4882

https://buildkite.com/elastic/elastic-agent-binary-dra/builds/2810

[mergify]

This pull request does not have a backport label. Could you fix it @v1v? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-./d./d is the label that automatically backports to the 8./d branch. /d is the digit
• backport-active-all is the label that automatically backports to all active branches.
• backport-active-8 is the label that automatically backports to all active minor branches for the 8 major.
• backport-active-9 is the label that automatically backports to all active minor branches for the 9 major.

[elasticmachine]

💔 Build Failed

• Buildkite Build
• Commit: d8ae93f

Failed CI Steps

• DRA staging

History

• 💔 Build #19001 failed 72da22f
• 💚 Build #18702 succeeded 227f3dc
• 💚 Build #18476 succeeded 2588e8f
• 💔 Build #18463 failed 15d03d2
• 💔 Build #18458 failed 055bb6f
• 💔 Build #18455 failed 159590e

cc @v1v