[Rust] Add Builder interface for adding Arrays to record batches

Use case:

While writing tests (both in IOx and in DataFusion) where I need a single `RecordBatch`, I often find myself doing something like this:

```
let schema = Arc::new(Schema::new(vec![
ArrowField::new("float_field", ArrowDataType::Float64, true),
ArrowField::new("time", ArrowDataType::Int64, true),
]));

let float_array: ArrayRef = Arc::new(Float64Array::from(vec![10.1, 20.1, 30.1, 40.1]));
let timestamp_array: ArrayRef = Arc::new(Int64Array::from(vec![1000, 2000, 3000, 4000]));

let batch = RecordBatch::try_new(schema, vec![float_array, timestamp_array])
.expect("created new record batch");
```

This is annoying because the information that `float_field` is a float is encoded both in the Schema and the `Float64Array`

I would much rather rather be able to construct RecordBatches a a builder style to avoid the the redundancy and reduce the amount of typing / redundancy:

```

let float_array: ArrayRef = Arc::new(Float64Array::from(vec![10.1, 20.1, 30.1, 40.1]));
let timestamp_array: ArrayRef = Arc::new(Int64Array::from(vec![1000, 2000, 3000, 4000]));

let batch = RecordBatch::empty()
.append("float_field", timestamp_array).unwrap()
.append("time", float_array).unwrap;

```

The proposal is to add a method to `RecordBatch` like

```
impl RecordBatch

{ ... fn append(self, field_name: &str, field_values: ArrayRef) -> Result<Self> }

```

That would append the a field name to the current schema, returning an error if field_name was already present.

The nullability of the field would be set based on the actual null count of the field_values