bug: map type has been converted into an arrow map type with a wrong field type

[chenzl25]

Describe the bug

The inner field data type of arrow map type should be a Struct<k,v> instead of List<Struct<k,v>>

risingwave/src/common/src/array/arrow/arrow_impl.rs

Lines 449 to 460 in c843edc

	fn map_type_to_arrow(&self, map_type: &MapType) -> Result<arrow_schema::DataType, ArrayError> {
	let sorted = false;
	let list_type = map_type.clone().into_list();
	Ok(arrow_schema::DataType::Map(
	Arc::new(arrow_schema::Field::new(
	"entries",
	self.list_type_to_arrow(&list_type)?,
	true,
	)),
	sorted,
	))
	}

/// A Map is a logical nested type that is represented as
///
/// List<entries: Struct<key: K, value: V>>
///
/// The keys and values are each respectively contiguous.
/// The key and value types are not constrained, but keys should be
/// hashable and unique.
/// Whether the keys are sorted can be set in the bool after the Field.
///
/// In a field with Map type, the field has a child Struct field, which then
/// has two children: key type and the second the value type. The names of the
/// child fields may be respectively "entries", "key", and "value", but this is
/// not enforced.

Error message/log

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To Reproduce

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Expected behavior

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How did you deploy RisingWave?

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The version of RisingWave

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Additional context

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