Major Description
Since https://github.com/apache/spark/pull/30386, Spark always throws an error on invalid access to a map column. There is no such syntax in the ANSI SQL standard since there is no Map type in it. There is a similar type `multiset` which returns null on non-existing element access.
Also, I investigated PostgreSQL/Snowflake/Biguqery and all of them returns null return on map(json) key not exists.
I suggest loosen the the syntax here. When users get the error, most of them will just use `try_element_at()` to get the same syntax or just turn off the ANSI SQL mode.
