`RowConverter` panics when encoding union array with non-default type IDs

[kawadakk]

Describe the bug
RowConverter::append panics when union fields have non-default type IDs.

To Reproduce
Update arrow_row::tests::test_row_converter_roundtrip_with_one_union_column as follows:

@@ -4317,3 +4317,3 @@ mod tests {
         let fields = UnionFields::try_new(
-            vec![0, 1],
+            vec![70, 1],
             vec![
@@ -4327,3 +4327,3 @@ mod tests {
         let string_array = StringArray::from(vec![None::<&str>, Some("hello")]);
-        let type_ids = vec![0i8, 1].into();
+        let type_ids = vec![70i8, 1].into();

$ cargo test -p arrow-row test_row_converter_roundtrip_with_one_union_column
    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
     Running unittests src/lib.rs (target/debug/deps/arrow_row-cab30e58e5bacbe0)

running 1 test
test tests::test_row_converter_roundtrip_with_one_union_column ... FAILED

failures:

---- tests::test_row_converter_roundtrip_with_one_union_column stdout ----

thread 'tests::test_row_converter_roundtrip_with_one_union_column' (562579) panicked at arrow-array/src/array/union_array.rs:253:24:
invalid type id
stack backtrace:
   0: __rustc::rust_begin_unwind
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/std/src/panicking.rs:698:5
   1: core::panicking::panic_fmt
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/panicking.rs:75:14
   2: core::panicking::panic_display
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/panicking.rs:259:5
   3: core::option::expect_failed
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/option.rs:2178:5
   4: core::option::Option<T>::expect
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/option.rs:965:21
   5: arrow_array::array::union_array::UnionArray::child
             at .../arrow-rs/arrow-array/src/array/union_array.rs:253:24
   6: arrow_row::Codec::encoder
             at ./src/lib.rs:681:51
   7: arrow_row::RowConverter::append::{{closure}}
             at ./src/lib.rs:879:23
   8: core::iter::adapters::map::map_try_fold::{{closure}}
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/iter/adapters/map.rs:95:28
   9: core::iter::traits::iterator::Iterator::try_fold
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/iter/traits/iterator.rs:2426:21
  10: <core::iter::adapters::map::Map<I,F> as core::iter::traits::iterator::Iterator>::try_fold
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/iter/adapters/map.rs:121:19
  11: <core::iter::adapters::GenericShunt<I,R> as core::iter::traits::iterator::Iterator>::try_fold
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/iter/adapters/mod.rs:192:14
  12: core::iter::traits::iterator::Iterator::try_for_each
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/iter/traits/iterator.rs:2487:14
  13: <core::iter::adapters::GenericShunt<I,R> as core::iter::traits::iterator::Iterator>::next
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/iter/adapters/mod.rs:174:14
  14: <alloc::vec::Vec<T> as alloc::vec::spec_from_iter_nested::SpecFromIterNested<T,I>>::from_iter
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/alloc/src/vec/spec_from_iter_nested.rs:25:41
  15: <alloc::vec::Vec<T> as alloc::vec::spec_from_iter::SpecFromIter<T,I>>::from_iter
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/alloc/src/vec/spec_from_iter.rs:34:9
  16: <alloc::vec::Vec<T> as core::iter::traits::collect::FromIterator<T>>::from_iter
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/alloc/src/vec/mod.rs:3683:9
  17: core::iter::traits::iterator::Iterator::collect
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/iter/traits/iterator.rs:2027:9
  18: <core::result::Result<V,E> as core::iter::traits::collect::FromIterator<core::result::Result<A,E>>>::from_iter::{{closure}}
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/result.rs:2144:51
  19: core::iter::adapters::try_process
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/iter/adapters/mod.rs:160:17
  20: <core::result::Result<V,E> as core::iter::traits::collect::FromIterator<core::result::Result<A,E>>>::from_iter
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/result.rs:2144:9
  21: core::iter::traits::iterator::Iterator::collect
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/iter/traits/iterator.rs:2027:9
  22: arrow_row::RowConverter::append
             at ./src/lib.rs:881:14
  23: arrow_row::RowConverter::convert_columns
             at ./src/lib.rs:810:14
  24: arrow_row::tests::test_row_converter_roundtrip_with_one_union_column
             at ./src/lib.rs:4346:14
  25: arrow_row::tests::test_row_converter_roundtrip_with_one_union_column::{{closure}}
             at ./src/lib.rs:4316:60
  26: core::ops::function::FnOnce::call_once
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/ops/function.rs:250:5
  27: core::ops::function::FnOnce::call_once
             at /rustc/ed61e7d7e242494fb7057f2657300d9e77bb4fcb/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.


failures:
    tests::test_row_converter_roundtrip_with_one_union_column

test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 60 filtered out; finished in 0.02s

error: test failed, to rerun pass `-p arrow-row --lib`

Expected behavior
Successful test run

Additional context

[alamb]

FYI @friendlymatthew

[alamb]

@kawadakk thank you for the report. PRs to fix the issue would be most appreciated