[r] SparseNDArray/DenseNDArray create methods need to accept tile extent from PlatformConfig

[johnkerl]

Found while working on issue #2407 / [sc-51048].

SOMADataFrame

The SOMADataFrame create method accepts platform_config here:

TileDB-SOMA/apis/r/R/SOMADataFrame.R

Lines 26 to 31 in 248f46e

	create = function(
	schema,
	index_column_names = c("soma_joinid"),
	platform_config = NULL,
	internal_use_only = NULL
	) {

That's passed here

TileDB-SOMA/apis/r/R/SOMADataFrame.R

Lines 49 to 53 in 248f46e

	dom_ext_tbl <- get_domain_and_extent_dataframe(
	schema,
	ind_col_names = index_column_names,
	tdco = tiledb_create_options
	)

and used here

TileDB-SOMA/apis/r/R/utils-arrow.R

Line 364 in 248f46e

ind_ext <- tdco$dim_tile(ind_col_name)

SOMASparseNDArray and SOMADenseNDArray

The SOMANDArrayBase create method accepts platform_config here:

TileDB-SOMA/apis/r/R/SOMANDArrayBase.R

Line 29 in 248f46e

platform_config = NULL,

That's not passed here

TileDB-SOMA/apis/r/R/SOMANDArrayBase.R

Line 42 in 248f46e

dom_ext_tbl <- get_domain_and_extent_array(shape)

and so here

TileDB-SOMA/apis/r/R/utils-arrow.R

Line 392 in 248f46e

ind_ext <- shape[ind+1]

the extent is set to shape minus one.

This isn't super-high-pri, but, it should be fixed.