Return the 'AsBuilt' JSON string
Examples
if (tiledb_version(TRUE) > "2.17") {
txt <- tiledb::tiledb_config_as_built_json()
}
## now eg either one of
## sapply(jsonlite::fromJSON(txt)$as_built$parameters$storage_backends, \(x) x[[1]])
## sapply(RcppSimdJson::fparse(txt)$as_built$parameters$storage_backends, \(x) x[[1]])
## will return a named vector such as
## c(azure = FALSE, gcs = FALSE, hdfs = FALSE, s3 = TRUE)