Upgrade parquet-go to 0.25.1

[simonswine]

I have seen a couple of problems when looking into #4472

• ReadRows not used correctly (in tests, maybe code base), io.EOF not handled.
• Problems around parquet.Group, might need an updated following upstream change

  pyroscope/pkg/parquet/group.go

  Lines 16 to 17 in 73a7873

  	// Group allows to write a custom ordered schema. As opposed to parquet.Group which orders fields alphabethical as it is based on a map.
  	type Group []parquet.Field