Plug the grenad max memory parameter

crates/milli/src/update/indexer_config.rs

@@ -1,5 +1,6 @@
 use grenad::CompressionType;
 
+use super::GrenadParameters;
 use crate::thread_pool_no_abort::ThreadPoolNoAbort;
 
 #[derive(Debug)]
@@ -15,6 +16,17 @@ pub struct IndexerConfig {
     pub skip_index_budget: bool,
 }
 
+impl IndexerConfig {
+    pub fn grenad_parameters(&self) -> GrenadParameters {
+        GrenadParameters {
+            chunk_compression_type: self.chunk_compression_type,
+            chunk_compression_level: self.chunk_compression_level,
+            max_memory: self.max_memory,
+            max_nb_chunks: self.max_nb_chunks,
+        }
+    }
+}
+
 impl Default for IndexerConfig {
     fn default() -> Self {
         Self {