[automation] update elastic stack version for testing 8.7.0-84b6e00d

[apmmachine]

What

Bump stack version with the latest one.

Further details

[start_time:Mon, 21 Nov 2022 00:14:45 GMT, release_branch:master, prefix:, end_time:Mon, 21 Nov 2022 03:45:52 GMT, manifest_version:2.1.0, version:8.7.0-SNAPSHOT, branch:master, build_id:8.7.0-84b6e00d, build_duration_seconds:12667]

[elasticmachine]

💚 Build Succeeded

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Build stats

• Start Time: 2022-11-21T05:17:34.322+0000

• Duration: 18 min 18 sec

Test stats 🧪

Test	Results
Failed	0
Passed	4481
Skipped	13
Total	4494

💚 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	98.305% (58/59)	❕
Files	71.066% (140/197)	❕
Classes	70.557% (266/377)	❕
Methods	54.834% (794/1448)	❕
Lines	40.283% (8571/21277)	❕
Conditionals	100.0% (0/0)	💚

[mergify]

Automatically approving mergify