feat: re-enable hashes-in-blocks feature on all subnets (dfinity#3562)

The feature has been gradually rolled out to all subnets except the NNS
for two weeks and we haven't observed any issues.

Author: kpop-dfinity

rs/replica/setup_ic_network/src/lib.rs

@@ -72,7 +72,7 @@ use tower_http::trace::TraceLayer;
 /// we will reconstruct the blocks by looking up the referenced ingress messages in the ingress
 /// pool or, if they are not there, by fetching missing ingress messages from peers who are
 /// advertising the blocks.
-const HASHES_IN_BLOCKS_FEATURE_ENABLED: bool = false;
+const HASHES_IN_BLOCKS_FEATURE_ENABLED: bool = true;
 
 /// This limit is used to protect against a malicious peer advertising many ingress messages.
 /// If no malicious peers are present the ingress pools are bounded by a separate limit.