m365_defender,microsoft_defender_endpoint: drop empty event sets #5164
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What does this PR do?
The adds checks for empty event sets returned by the MS API and drops documents that have not event.
The change is also added to the deprecated M365 Defender log data stream after off-line discussion with @jamiehynds as there have been a number of reports of this in that package and the change is trivial.
Checklist
changelog.ymlfile.Author's Checklist
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