[Rust]: Return error on mismatching datatypes in json reader

[alamb]

Note: migrated from original JIRA: https://issues.apache.org/jira/browse/ARROW-10082

See [https://github.com/apache/arrow/blob/f358a29b35a9059c42aa8e6bcdd7a17136f14647/rust/arrow/src/json/reader.rs#L678]

 

If the schema specifies a different datatype than what is in the file the value gets silently ignored. Instead we should return an error.

[alamb]

Comment from Jörn Horstmann(jhorstmann) @ 2020-09-24T18:17:39.428+0000:

Accidentally closed the wrong ticket as "fixed by"