apache / apache/beam

Implement parquetio for Go SDK

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go new feature P2
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Description

The naive approach would be reading the whole parquet file into memory, because processing parquet files requires io.Seeker
Or implement filesystem.go Interface to return io.ReadSeekCloser, but it would not be trivial for gcs

Imported from Jira [BEAM-14304](https://issues.apache.org/jira/browse/BEAM-14304). Original Jira may contain additional context.
Reported by: nguyennk92.

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