[I] COUNT(DISTINCT) on StringView panics: `unreachable code: Utf8/Binary should use ArrowBytesSet` [arrow-rs]

["alamb (via GitHub)" <gi...@apache.org>]

alamb opened a new issue, #6176:
URL: https://github.com/apache/arrow-rs/issues/6176

   **Describe the bug**
   I found one of the clickbench extended queries panics when using StringView -- https://github.com/apache/datafusion/pull/11723
   
   **To Reproduce**
   ```
   > create table foo (id int, x varchar, y varchar) as values (1, 'foo', 'bar'), (2, 'foo', 'baz');
   0 row(s) fetched.
   Elapsed 0.004 seconds.
   
   > create view foov as select id, arrow_cast(x, 'Utf8View') as x, arrow_cast(y, 'Utf8View') as y from foo;
   0 row(s) fetched.
   Elapsed 0.002 seconds.
   
   > select count(distinct x), count(distinct y) from foov group by id;
   thread 'tokio-runtime-worker' panicked at /Users/andrewlamb/Software/datafusion2/datafusion/physical-expr-common/src/binary_view_map.rs:220:18:
   internal error: entered unreachable code: Utf8/Binary should use `ArrowBytesSet`
   note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
   External error: Join Error
   caused by
   External error: task 65 panicked
   ```
   
   **Expected behavior**
   The query should run without panic
   
   **Additional context**
   <!--
   Add any other context about the problem here.
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