LAST JOIN with complex condition not work on offline mode

**Bug Description**

**Offline sql and error message**

### select t1.col1 from t1 last join t2 order by t2.std_time on int(t1.col1)=int(t2.col1) and t1.col1=t2.col1;

> ERROR yarn.Client: Application diagnostics message: User class threw exception: com._4paradigm.hybridse.sdk.UnsupportedHybridSeException: Fail to resolve expr type: kExprCast, expr node: int32(t1.col1)

The error occurs during SQL expression type resolution in offline mode for a LAST JOIN with a cast condition. Look at the SQL parser and type resolver, likely in the hybridse sdk. The failing expression is `int(t1.col1)`. Run the provided SQL in offline mode to reproduce, then trace through the cast expression handling.

Written by the indexing model from the issue text.