Support as_mut_any in Array trait

[Ted-Jiang]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
now Array trait only support as_any

arrow-rs/arrow-array/src/array/mod.rs

Lines 72 to 106 in 9728c67

	pub trait Array: std::fmt::Debug + Send + Sync {
	/// Returns the array as [`Any`](std::any::Any) so that it can be
	/// downcasted to a specific implementation.
	///
	/// # Example:
	///
	/// ```
	/// # use std::sync::Arc;
	/// # use arrow_array::{Int32Array, RecordBatch};
	/// # use arrow_schema::{Schema, Field, DataType, ArrowError};
	///
	/// let id = Int32Array::from(vec![1, 2, 3, 4, 5]);
	/// let batch = RecordBatch::try_new(
	/// Arc::new(Schema::new(vec![Field::new("id", DataType::Int32, false)])),
	/// vec![Arc::new(id)]
	/// ).unwrap();
	///
	/// let int32array = batch
	/// .column(0)
	/// .as_any()
	/// .downcast_ref::<Int32Array>()
	/// .expect("Failed to downcast");
	/// ```
	fn as_any(&self) -> &dyn Any;
	/// Returns a reference to the underlying data of this array.
	fn data(&self) -> &ArrayData;
	/// Returns the underlying data of this array.
	fn into_data(self) -> ArrayData;
	/// Returns a reference-counted pointer to the underlying data of this array.
	fn data_ref(&self) -> &ArrayData {
	self.data()
	}

When I implementing using copy on write to evaluate col_x+1 binary_expr,
I need cast ArrayRef to PrimitiveArray with ownership and with strong reference one😩 then pass to unary_mut.

arrow-rs/arrow-arith/src/arity.rs

Lines 59 to 65 in 26ea71c

	pub fn unary_mut<I, F>(
	array: PrimitiveArray<I>,
	op: F,
	) -> std::result::Result<PrimitiveArray<I>, PrimitiveArray<I>>
	where
	I: ArrowPrimitiveType,
	F: Fn(I::Native) -> I::Native,

So i decide using downcast_mut then use mem::take() get the array: PrimitiveArray<I>,

But there no as_any_mut , so i try to add this func 🤔.
Seems there already one in ArrayBuilder

arrow-rs/arrow-array/src/builder/mod.rs

Line 129 in f0be9da

fn as_any_mut(&mut self) -> &mut dyn Any;

Describe the solution you'd like

Describe alternatives you've considered

Additional context

[Ted-Jiang]

@tustvold @alamb Plz help take a look 😄

[tustvold]

Why not use https://docs.rs/arrow-array/latest/arrow_array/cast/fn.downcast_array.html, this would avoid needing to use take

[alamb]

I think this is a similar ask to #2901

There is somewhat of a workaround listed #2901 (comment)

I wonder if that would work?

[Ted-Jiang]

seems both solution use T::from(array.data().clone()) will +1 to array.data() strong reference.

[tustvold]

seems both solution use T::from(array.data().clone()) will +1 to array.data() strong reference.

Provided you then proceed to drop the ArrayRef that is fine? FWIW you will have the same problem with downcast_mut