[feature-wip](array-type) support explode and explode_outer table function (#8766)

explode(ArrayColumn) desc:
> Create a row for each element in the array column. 

explode_outer(ArrayColumn) desc:
> Create a row for each element in the array column. Unlike explode, if the array is null or empty, it returns null.

Usage example:
1. create a table with array column, and insert some data;
2. open enable_lateral_view and enable_vectorized_engine;
```
set enable_lateral_view = true;
set enable_vectorized_engine=true;
```
3. use explode_outer
```
> select * from array_test;
+------+------+--------+
| k1   | k2   | k3     |
+------+------+--------+
|    3 | NULL | NULL   |
|    1 |    2 | [1, 2] |
|    2 |    3 | NULL   |
|    4 | NULL | []     |
+------+------+--------+

> select k1,explode_column from array_test LATERAL VIEW explode_outer(k3) TempExplodeView as explode_column;
+------+----------------+
| k1   | explode_column |
+------+----------------+
|    1 |              1 |
|    1 |              2 |
|    2 |           NULL |
|    4 |           NULL |
|    3 |           NULL |
+------+----------------+
```
4. explode usage example. explode return empty rows while the ARRAY is null or empty
```
> select k1,explode_column from array_test LATERAL VIEW explode(k3) TempExplodeView as explode_column;
+------+----------------+
| k1   | explode_column |
+------+----------------+
|    1 |              1 |
|    1 |              2 |
+------+----------------+
```

be/src/exprs/table_function/table_function.h

@@ -98,6 +98,9 @@ public:
         _vexpr_context = vexpr_context;
     }
 
+    bool is_outer() const { return _is_outer; }
+    bool current_empty() const { return _is_current_empty; }
+
 protected:
     std::string _fn_name;
     ExprContext* _expr_context = nullptr;
@@ -111,6 +114,8 @@ protected:
     int64_t _cur_offset = 0;
     // the size of current result
     int64_t _cur_size = 0;
+    // set _is_outer to false for explode function, and should not return tuple while array is null or empty
+    bool _is_outer = true;
 };
 
 } // namespace doris