BinaryBuilder and StringBuilder initialization parameters in struct_builder may be wrong

[chunshao90]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
BinaryBuilder and StringBuilder initialization parameters in struct_builder may be wrong.

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

Line 108 in a7cf274

DataType::Binary => Box::new(BinaryBuilder::with_capacity(1024, capacity)),

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

Line 115 in a7cf274

DataType::Utf8 => Box::new(StringBuilder::with_capacity(1024, capacity)),

Refor to with_capacity() of BinaryBuilder and StringBuilder, the first parameter is item_capacity and the second parameter is data_capacity.

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

Line 41 in a7cf274

/// - `item_capacity` is the number of items to pre-allocate.

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

Line 39 in a7cf274

/// - `item_capacity` is the number of items to pre-allocate.

Describe the solution you'd like

We need to swap parameters, which means preallocating 1kB of data value buffer.

BinaryBuilder::with_capacity(capacity, 1024)
StringBuilder::with_capacity(capacity, 1024)

Describe alternatives you've considered

Additional context