* Modify export example in en and zh-cn doc.
* Add datetime function test for regression test.
* Add some invalid date to convert_tz
Co-authored-by: smallhibiscus <844981280>
1. Remove session variable "enable_lateral_view"
2. Remove Fe config: enable_materialized_view
3. Remove Fe config: enable_create_sync_job
4. Fe config dynamic_partition_enable is only used for disable dynamic partition scheduler.
Function round support two format round(double) and round(double, int), the argument is variadic.
But FunctionBinaryArithmetic not support variadic argument now, make get_function for round(double, int) failed.
reproduce steps:
1. set enable_vectorized_engine=true;
2. try to call round(double, int);
```
> select round(10.12345,2);
ERROR 1105 (HY000): errCode = 2, detailMessage = Function round is not implemented
```
