Upgrade Go to 1.20.5

[AndersonQ]

What does this PR do?

Upgrade Go to 1.20.5

Why is it important?

To keep up with the latest Go improvements, features and bug fixes.

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.

Related issues

• N/A

[elasticmachine]

💚 Build Succeeded

the below badges are clickable and redirect to their specific view in the CI or DOCS

Expand to view the summary

Build stats

• Start Time: 2023-07-06T17:49:59.094+0000

• Duration: 19 min 49 sec

❕ Flaky test report

No test was executed to be analysed.

🤖 GitHub comments

Expand to view the GitHub comments

To re-run your PR in the CI, just comment with:

• /test : Re-trigger the build.

[cmacknz]

It looks like it didn't build the darwin-aarch64 binary which is weird. There are also no logs. Let's just try it again.

[2023-07-05T16:31:46.138Z] Error: Build: binary check failed: stat build/binaries/elastic-agent-shipper-8.10.0-SNAPSHOT-darwin-aarch64/elastic-agent-shipper: no such file or directory
script returned exit code 1

[cmacknz]

/test