[8.11] ESQL: Improve agg verification (#99827)#100414

Merged

alex-spies merged 1 commit intoelastic:8.11from alex-spies:backport/8.11/pr-99827

Oct 9, 2023

+79-27

Commits on Oct 6, 2023

ESQL: Improve agg verification (elastic#99827 )
alex-spies
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