Add Arrow Variant Extension Type, remove Array impl for VariantArray and ShreddedVariantFieldArray

parquet-variant-compute/benches/variant_kernels.rs

@@ -84,7 +84,7 @@ fn benchmark_batch_json_string_to_variant(c: &mut Criterion) {
 
 pub fn variant_get_bench(c: &mut Criterion) {
     let variant_array = create_primitive_variant_array(8192);
-    let input: ArrayRef = Arc::new(variant_array);
+    let input = ArrayRef::from(variant_array);
 
     let options = GetOptions {
         path: vec![].into(),

parquet-variant-compute/src/lib.rs

@@ -45,7 +45,7 @@ mod variant_array_builder;
 pub mod variant_get;
 mod variant_to_arrow;
 
-pub use variant_array::{ShreddingState, VariantArray};
+pub use variant_array::{ShreddingState, VariantArray, VariantType};
 pub use variant_array_builder::{VariantArrayBuilder, VariantValueArrayBuilder};
 
 pub use cast_to_variant::{cast_to_variant, cast_to_variant_with_options};