Add DataType::Utf8View and DataType::BinaryView

[alamb]

This is part of the larger project to implement StringViewArray -- see #5374

The first thing we will need is a new variant in DataType to support this type

So the basic task is to

1. Add the appropriate variants in DataType
2. Update the rest of arrow-rs to handle that new variant (largely would be an exercise in returning NotYetImplemented errors)

For inspiration I think you can look at #4585 (specifically types.rs https://github.com/apache/arrow-rs/pull/4585/files#diff-ff91e9fd06b025009cc1d0f9360ecdb8c3d9ea972e8f87b4419eab01e1e8fb7c)

I reviewed the Arrow spec that was approved and there does not appear to be any equivalent to LargeUtf8 (e.g there is no LargeUtf8View):

https://github.com/apache/arrow/blob/c4e088a1d6227868e020c71d596970f35bb9e4c9/format/Schema.fbs#L187-L205

[alamb]

FYI @ariesdevil

[XiangpengHao]

I can work on this if no one else is working on it.

[tustvold]

label_issue.py automatically added labels {'parquet'} from #5470

[tustvold]

label_issue.py automatically added labels {'arrow'} from #5470