added stats related to DiskBBQ (#5722)

Author: john-wagster

specification/cluster/stats/types.ts

@@ -188,6 +188,10 @@ export class DenseVectorOffHeapStats {
   total_veq_size?: ByteSize
   total_vex_size_bytes: long
   total_vex_size?: ByteSize
+  total_cenif_size_bytes: long
+  total_cenif_size?: ByteSize
+  total_clivf_size_bytes: long
+  total_clivf_size?: ByteSize
   fielddata?: Dictionary<string, Dictionary<string, long>>
 }