chore: [k201] fix(blooms): Fix partitionSeriesByDay function

[grafanabot]

Backport 738c274 from #12900

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What this PR does / why we need it:

The function partitionSeriesByDay could yield empty when chunks were outside of the requested time range.

This would result in requests for a time range that does not contain any
chunks for a series to filter. These requests would return errors, because a subsequent partitionSeriesByDay for would remove that day resulting in no task.

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
• Title matches the required conventional commits format, see here
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