[PR] [fix](scan) fix predicate contains cast that results in null, the predicate will be miss. [doris]

[via GitHub]

Mryange opened a new pull request, #39550:
URL: https://github.com/apache/doris/pull/39550

   ## Proposed changes
   ```
   drop table datetest;
   
   create table datetest (
     id int,
     dt date
   )
   DUPLICATE key (id)
   distributed by hash(id) buckets 1
   properties(
     "replication_num" = "1"
   );
   insert into datetest values (1, '2024-01-01');
   ```
   
   now
   
   ```
   mysql [test10]>select dt from datetest  WHERE dt = 1 ;
   Empty set (0.16 sec)
   ```
   
   <!--Describe your changes.-->
   
   


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