Migrate to elastic-agent-shipper-client

[rdner]

What does this PR do?

So, we stop copying the package to Beats and use a shared package instead.

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

• Depends on Add helpers code from the original code elastic-agent-shipper-client#10 to be merged and tagged.
• Closes Allow the Beats' shipper output to depend on the shipper client directly. elastic-agent-shipper#64

[elasticmachine]

💔 Build Failed

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Build stats

• Start Time: 2022-07-05T19:48:18.758+0000

• Duration: 120 min 19 sec

Test stats 🧪

Test	Results
Failed	0
Passed	22405
Skipped	1937
Total	24342

Steps errors

Expand to view the steps failures

metricbeat-goIntegTest - mage goIntegTest

• Took 30 min 30 sec . View more details here
• Description: mage goIntegTest

Building Beats » Beats Packaging » PR-32185

• Took 31 min 57 sec . View more details here
• Description: null

💚 Flaky test report

Tests succeeded.

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[rdner]

@Mergifyio update

[mergify]

update

✅ Branch has been successfully updated

[rdner]

@cmacknz I might have to wait until #32161 is merged, I have the same failures after updating elastic-agent-libs to v0.2.7

[cmacknz]

The tests are passing in #32161, just needs an approval. Feel free to merge it yourself if needed.

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b use-shipper-client upstream/use-shipper-client
git merge upstream/main
git push upstream use-shipper-client

[rdner]

Packaging errors are not related to the change.

[elasticmachine]

Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)