[SPARK-15379][SQL] check special invalid date

## What changes were proposed in this pull request?

When invalid date string like "2015-02-29 00:00:00" are cast as date or timestamp using spark sql, it used to not return null but another valid date (2015-03-01 in this case).
In this pr, invalid date string like "2016-02-29" and "2016-04-31" are returned as null when cast as date or timestamp.

## How was this patch tested?

Unit tests are added.

(If this patch involves UI changes, please attach a screenshot; otherwise, remove this)

Author: wangyang <wangyang@haizhi.com>

Closes #13169 from wangyang1992/invalid_date.