[7.16](backport #28827) Osquerybeat: Fix restart flags after previously bad config

[mergify]

This is an automatic backport of pull request #28827 done by Mergify.

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[elasticmachine]

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• Start Time: 2021-11-05T01:53:21.385+0000

• Duration: 22 min 50 sec

• Commit: f1c3326

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[aleksmaus]

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