[8.19] (backport #8337) Add custom ECH deployment + smoke test

[mergify]

What does this PR do?

Use the image produced in the packaging step as the integrations server image for an ECH deployment and run a basic smoke test against that deployment. This allows for the changes made in a PR to be tested as a part of the cloud image in addition to the current test coverage.

Why is it important?

Removes the 1 day delay from producing a SNAPSHOT image to testing the image.

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

N/A

---

This is an automatic backport of pull request #8337 done by Mergify.

[mergify]

Cherry-pick of c1136e4 has failed:

On branch mergify/bp/8.19/pr-8337
Your branch is up to date with 'origin/8.19'.

You are currently cherry-picking commit c1136e4ab.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   .buildkite/bk.integration-fips.pipeline.yml
	modified:   .buildkite/bk.integration.pipeline.yml
	modified:   .buildkite/integration.pipeline.yml
	modified:   .buildkite/scripts/steps/integration_tests_tf.sh
	new file:   testing/integration/ess/ech_test.go
	modified:   testing/integration/groups.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   magefile.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[elasticmachine]

Pinging @elastic/elastic-agent-control-plane (Team:Elastic-Agent-Control-Plane)

[mergify]

This pull request has not been merged yet. Could you please review and merge it @michel-laterman? 🙏

[pkoutsovasilis]

@michel-laterman could you please handle the conflicts of this backport? 🙂

[elasticmachine]

⏳ Build in-progress, with failures

• Buildkite Build
• Commit: 29fdb57

Failed CI Steps

• :sonarqube: Continuous Code Inspection
• fips:x86_64:sudo-true:fleet
• fips:arm64:sudo-true:fleet

History

• 💔 Build #24118 failed eb4ba20
• 💔 Build #23986 failed cd11ba3

cc @michel-laterman