Bug: multi scalar subquery cause optimizer panic

[chenzl25]

Describe the bug

create table t (a int);
create table dl(c1 int, c2 int);
create table di(d1 int, d2 int);

explain (trace) create materialized view outbound_tracking_mv as 
select
        (select 1 from t,di where t.a = dl.c1 limit 1) name
        , (select 1 from t, di where t.a = dl.c2  limit 1) name2
from dl;

Error message/log

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To Reproduce

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Expected behavior

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How did you deploy RisingWave?

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The version of RisingWave

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Additional context

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