Speedup deserialization in InternalAggregations (#105596)

We can use the faster list reader here because the category is a
constant.

Author: original-brownbear

server/src/main/java/org/elasticsearch/search/aggregations/InternalAggregations.java

@@ -165,7 +165,7 @@ public static InternalAggregations from(List<InternalAggregation> aggregations)
     }
 
     public static InternalAggregations readFrom(StreamInput in) throws IOException {
-        return from(in.readCollectionAsList(stream -> stream.readNamedWriteable(InternalAggregation.class)));
+        return from(in.readNamedWriteableCollectionAsList(InternalAggregation.class));
     }
 
     @Override