fix(rust): fix async feature compile error (#18682)

Co-authored-by: hzlinyiyu <hzlinyiyu@corp.netease.com>

crates/polars-plan/src/plans/functions/count.rs

@@ -13,7 +13,7 @@ use polars_io::cloud::CloudOptions;
 use polars_io::csv::read::{
     count_rows as count_rows_csv, count_rows_from_slice as count_rows_csv_from_slice,
 };
-#[cfg(all(feature = "parquet", feature = "cloud"))]
+#[cfg(all(feature = "parquet", feature = "async"))]
 use polars_io::parquet::read::ParquetAsyncReader;
 #[cfg(feature = "parquet")]
 use polars_io::parquet::read::ParquetReader;