Add buildkite pipeline to build elastic-agent binary artifacts

[marc-gr]

What does this PR do?

Adds a new buildkite pipeline to release the elastic-agent binary artifacts

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/fragments using the changelog tool
  - [ ] I have added an integration test or an E2E test

Related issues

• Depends on Add mage command to build and package only elastic-agent binaries #2798
• Relates Separate the packaging step from the agent build step #2498

[mergify]

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

• backport-v./d./d./d is the label to automatically backport to the 8./d branch. /d is the digit

NOTE: backport-skip has been added to this pull request.

[elasticmachine]

💚 Build Succeeded

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Build stats

• Start Time: 2023-07-10T07:45:55.738+0000

• Duration: 20 min 39 sec

Test stats 🧪

Test	Results
Failed	0
Passed	16
Skipped	0
Total	16

💚 Flaky test report

Tests succeeded.

🤖 GitHub comments

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

• /test : Re-trigger the build.

• /package : Generate the packages.

• run integration tests : Run the Elastic Agent Integration tests.

• run end-to-end tests : Generate the packages and run the E2E Tests.

• run elasticsearch-ci/docs : Re-trigger the docs validation. (use unformatted text in the comment!)

[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	25.974% (20/77)	👍
Files	12.928% (34/263)	👍
Classes	8.998% (44/489)	👍
Methods	6.646% (127/1911)	👍
Lines	4.616% (1361/29487)	👍
Conditionals	100.0% (0/0)	💚

[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 feat/bindist-buildkite-pipeline upstream/feat/bindist-buildkite-pipeline
git merge upstream/main
git push upstream feat/bindist-buildkite-pipeline

[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 feat/bindist-buildkite-pipeline upstream/feat/bindist-buildkite-pipeline
git merge upstream/main
git push upstream feat/bindist-buildkite-pipeline

[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 feat/bindist-buildkite-pipeline upstream/feat/bindist-buildkite-pipeline
git merge upstream/main
git push upstream feat/bindist-buildkite-pipeline

[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 feat/bindist-buildkite-pipeline upstream/feat/bindist-buildkite-pipeline
git merge upstream/main
git push upstream feat/bindist-buildkite-pipeline

[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 feat/bindist-buildkite-pipeline upstream/feat/bindist-buildkite-pipeline
git merge upstream/main
git push upstream feat/bindist-buildkite-pipeline

[marc-gr]

Closed in favor of #3046

[mergify]

⚠️ The sha of the head commit of this PR conflicts with #3046. Mergify cannot evaluate rules on this PR. ⚠️

[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: 2023-07-10T13:11:22.929+0000

• Duration: 19 min 3 sec

Test stats 🧪

Test	Results
Failed	0
Passed	16
Skipped	0
Total	16

💚 Flaky test report

Tests succeeded.

🤖 GitHub comments

Expand to view the GitHub comments

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

• /test : Re-trigger the build.

• /package : Generate the packages.

• run integration tests : Run the Elastic Agent Integration tests.

• run end-to-end tests : Generate the packages and run the E2E Tests.

• run elasticsearch-ci/docs : Re-trigger the docs validation. (use unformatted text in the comment!)

[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	25.974% (20/77)	👍
Files	12.928% (34/263)	👍
Classes	8.998% (44/489)	👍
Methods	6.646% (127/1911)	👍
Lines	4.67% (1377/29487)	👍 0.034
Conditionals	100.0% (0/0)	💚