Push down filter plan for unnest on non-unnest column only

[jayzhan211]

Which issue does this PR close?

Closes #10989 Closes #10990 .

Rationale for this change

What changes are included in this PR?

Are these changes tested?

Are there any user-facing changes?

[jonahgao]

Looks good to me!

Maybe we can push down the part of the predicate that does not contain exec_columns?
For example in query

select ua from (select unnest(a) as ua, 1 as b from t) where ua > 3 and b > 1;

We can push down b > 1.

[alamb]

Looks good to me!

Maybe we can push down the part of the predicate that does not contain exec_columns? For example in query

select ua from (select unnest(a) as ua, 1 as b from t) where ua > 3 and b > 1;

We can push down b > 1.

I filed #11016 to track this item

[alamb]

Thanks @jayzhan211 and @jonahgao