[datafusion-spakr] implement from/to_utc_timestamp functions #19879
Description
Is your feature request related to a problem or challenge?
Implement the following spark functions:
- https://spark.apache.org/docs/latest/api/sql/index.html#from_utc_timestamp
- https://spark.apache.org/docs/latest/api/sql/index.html#to_utc_timestamp
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Additional context
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