[Metric threshold] Remove disabling missing group for document count aggregation (#173898)

Closes #173396

## Summary

This PR removes disabling missing group settings when aggregation is
document count because it also works as expected for this case. ([more
info](https://github.com/elastic/kibana/issues/173396#issuecomment-1867399404))

<img
src="d5b974cf-e18d-4d34-82ff-3891f57e719d"
width=500 />
This commit is contained in:
Maryam Saeidi 2024-01-04 12:07:00 +01:00 committed by GitHub
parent f8f0d87d5b
commit af4dcb419a
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@ -479,7 +479,7 @@ export const Expressions: React.FC<Props> = (props) => {
</EuiToolTip>
</>
}
disabled={disableNoData || !hasGroupBy}
disabled={!hasGroupBy}
checked={Boolean(hasGroupBy && ruleParams.alertOnGroupDisappear)}
onChange={(e) => setRuleParams('alertOnGroupDisappear', e.target.checked)}
/>