Changelog for 8.10.2

[pierrehilbert]

What does this PR do?

Why is it important?

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

Author's Checklist

• [ ]

How to test this PR locally

Related issues

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Screenshots

Logs

Questions to ask yourself

• How are we going to support this in production?
• How are we going to measure its adoption?
• How are we going to debug this?
• What are the metrics I should take care of?
• ...

[elasticmachine]

Pinging @elastic/elastic-agent (Team:Elastic-Agent)

[kilfoyle]

LGTM!
Release Notes are added via elastic/ingest-docs#509

[elasticmachine]

💚 Build Succeeded

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Build stats

• Start Time: 2023-09-21T14:08:04.428+0000

• Duration: 30 min 11 sec

Test stats 🧪

Test	Results
Failed	0
Passed	6251
Skipped	57
Total	6308

💚 Flaky test report

Tests succeeded.

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[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	98.765% (80/81)	👍
Files	67.719% (193/285)	👍
Classes	66.292% (354/534)	👍
Methods	52.978% (1112/2099)	👍
Lines	38.596% (12675/32840)	👍 0.024
Conditionals	100.0% (0/0)	💚