Handle sentinel partition value for null partition #18371
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Test plan - (Please fill in how you tested your changes)
A Hudi table with null partition value would be written with the sentinel partition value i.e.
__HIVE_DEFAULT_PARTITION__. This PR handles the sentinel value in Hudi connector while deserializing partition value.Tested by creating a Hudi table with null partition and querying the same through Presto.