[7.x](backport #26642) [fix][metricbeat] Change default value for server_status_path in nginx module

[mergify]

This is an automatic backport of pull request #26642 done by Mergify.

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[elasticmachine]

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• Start Time: 2021-08-02T14:05:21.134+0000

• Duration: 89 min 49 sec

• Commit: 6e5d1f1

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Test	Results
Failed	0
Passed	9145
Skipped	2318
Total	11463

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Test stats 🧪

Test	Results
Failed	0
Passed	9145
Skipped	2318
Total	11463

[mergify]

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 mergify/bp/7.x/pr-26642 upstream/mergify/bp/7.x/pr-26642
git merge upstream/7.x
git push upstream mergify/bp/7.x/pr-26642