branch-3.0: [fix](mtmv) Fix aggregate function roll up fail when function is always nullable #52960 #54687
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…ys nullable (#52960) ### What problem does this PR solve? Related PR: #36318 Problem Summary: materaialized view def is as fllowing: create materialized view as select k1, k3, sum(k2), count(k4) from ${tblName} group by k1, k3; `sum(k2) ` nullable is true if query is as following, would rewritten fail with err info 'query aggregate function roll up fail', the pr fix this select sum(distinct k1) from agg_use_key_direct
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Cherry-picked from #52960