[Release] Update test environments for 8.4.1

[elasticmachine]

Update test environment versions to the correct Elastic Stack version.

Merge only after the release of 8.4.0.

[elasticmachine]

:green_heart: Build Succeeded

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Build stats

• Start Time: 2022-08-24T15:58:58.612+0000

• Duration: 93 min 35 sec

Test stats :test_tube:

Test	Results
Failed	0
Passed	22613
Skipped	1937
Total	24550

:green_heart: Flaky test report

Tests succeeded.

:robot: GitHub comments

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

• /test : Re-trigger the build.

• /package : Generate the packages and run the E2E tests.

• /beats-tester : Run the installation tests with beats-tester.

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

[mergify[bot]]

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 update-testing-env-next-8.4.1 upstream/update-testing-env-next-8.4.1
git merge upstream/8.4
git push upstream update-testing-env-next-8.4.1

[cmacknz]

/test