Fix schema mismatch w/Parquet INT64 & Timestamp

[aweisberg]

Schema checks are too strict and prevent timestamp type from being read as int64 from Parquet files.
Fixes: #13855

== RELEASE NOTES ==
Parquet Changes
* Fix schema mismatch w/Parquet INT64 & Timestamp 

[aweisberg]

@arhimondr Does this not go far enough? Should all the other timestamp types that inherit from abstract long type work as well?

[arhimondr]

@aweisberg You mean the Timestamp With Time Zone?

[aweisberg]

Turns out Hive only supports Timestamp so no further changes were required.