Use the Artifactory Go proxy for unit tests

[swiatekm]

What does this PR do?

Why is it important?

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

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?
• ...

[mergify]

This pull request does not have a backport label. Could you fix it @swiatekm? 🙏
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 in-progress, with failures

• Buildkite Build
• Commit: a3b197e

Failed CI Steps

• Unit tests - Windows 2022
• Unit tests - Windows 2022
• Unit tests - Windows 2016
• Unit tests - Windows 2016
• Unit tests - Windows 10
• Unit tests - Windows 10
• Unit tests - Windows 11
• Unit tests - Windows 11
• Win2022:sudo:upgrade
• x86_64:sudo: fleet
• x86_64:sudo: default

History

• 💔 Build #30035 failed 3298510
• 💔 Build #30026 failed 6b9780c
• 💔 Build #29988 failed 83b4312
• 💔 Build #29984 failed 968e011

cc @swiatekm