arrow

ARROW-18101: [R] RecordBatchReaderHead from ExecPlan with UDF cannot be read (#14518)

This PR enables the following to work:

``` r
library(arrow, warn.conflicts = FALSE)
#> Some features are not enabled in this build of Arrow. Run `arrow_info()` for more information.

register_scalar_function(
  "times_32",
  function(context, x) x * 32.0,
  int32(),
  float64(),
  auto_convert = TRUE
)

record_batch(a = 1:1000) |> 
  dplyr::mutate(b = times_32(a)) |> 
  as_record_batch_reader() |> 
  head(11) |> 
  as_arrow_table()
#> Table
#> 11 rows x 2 columns
#> $a <int32>
#> $b <double>
```

(normally this isn't a problem because you should really call `head()` before `as_record_batch_reader()`, which communicates the top-k-ness of the query to the ExecPlan rather than relying on abandoning a RecordBatchReader; however, it still should work!)

Authored-by: Dewey Dunnington <dewey@voltrondata.com>
Signed-off-by: Dewey Dunnington <dewey@voltrondata.com>