[8.14](backport #39240) DRA: Disable summary reports for dry runs

[mergify]

Proposed commit message

DRA: Disable summary reports for dry runs.

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.next.asciidoc or CHANGELOG-developer.next.asciidoc.

Author's Checklist

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How to test this PR locally

Related issues

• Relates https://github.com/elastic/ingest-dev/issues/3095

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Logs

---

This is an automatic backport of pull request #39240 done by [Mergify](https://mergify.com).

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[elasticmachine]

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• Start Time: 2024-04-30T08:30:46.580+0000

• Duration: 14 min 49 sec

Test stats 🧪

Test	Results
Failed	0
Passed	3
Skipped	0
Total	3

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🤖 GitHub comments

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[dliappis]

LGTM