Recognize row IDs hidden in Hadoop partitions

[elharo]

Description

Hadoop partitions don't have a place for row ID partition components so store them inside the parameters as a string created by mapping the bytes to chars in ISO-8859-1.

Motivation and Context

Hive Partitions that were getting converted to and from org.apache.hadoop.hive.metastore.api.Partitions were losing the row ID partition component.

Impact

None

Test Plan

TestThriftHiveMetastoreUtil

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Release Notes

== NO RELEASE NOTE ==

[rschlussel]

actually, where is this used? Can we add this utility method when we add the usage too?

[rschlussel]

@elharo pointed out that the utility method is used to set the field in the partition right here in this PR.