[fuzz]: fix oss fuzz bug 34515, limit maglev table size (#16671)

Signed-off-by: chaoqin-li1123 <chaoqinli@google.com>

Mirrored from https://github.com/envoyproxy/envoy @ 9aca65c395f01020080166e4795455addde167fa

envoy/config/cluster/v3/cluster.proto

@@ -413,8 +413,8 @@ message Cluster {
     // The table size for Maglev hashing. The Maglev aims for ‘minimal disruption’ rather than an absolute guarantee.
     // Minimal disruption means that when the set of upstreams changes, a connection will likely be sent to the same
     // upstream as it was before. Increasing the table size reduces the amount of disruption.
-    // The table size must be prime number. If it is not specified, the default is 65537.
-    google.protobuf.UInt64Value table_size = 1;
+    // The table size must be prime number limited to 5000011. If it is not specified, the default is 65537.
+    google.protobuf.UInt64Value table_size = 1 [(validate.rules).uint64 = {lte: 5000011}];
   }
 
   // Specific configuration for the

envoy/config/cluster/v4alpha/cluster.proto

@@ -416,8 +416,8 @@ message Cluster {
     // The table size for Maglev hashing. The Maglev aims for ‘minimal disruption’ rather than an absolute guarantee.
     // Minimal disruption means that when the set of upstreams changes, a connection will likely be sent to the same
     // upstream as it was before. Increasing the table size reduces the amount of disruption.
-    // The table size must be prime number. If it is not specified, the default is 65537.
-    google.protobuf.UInt64Value table_size = 1;
+    // The table size must be prime number limited to 5000011. If it is not specified, the default is 65537.
+    google.protobuf.UInt64Value table_size = 1 [(validate.rules).uint64 = {lte: 5000011}];
   }
 
   // Specific configuration for the