Increase the P2P message limits (#2705)

## Description

Increase the P2P limits to allow to sync correctly. Previously the
default number of blocks in a batch could have been higher than the
default maximum size. Now the default values for each parameters are
aligned.

(We discovered it with big blocks on various networks)

## Checklist
- [x] Breaking changes are clearly marked as such in the PR description
and changelog
- [x] New behavior is reflected in tests
- [x] [The specification](https://github.com/FuelLabs/fuel-specs/)
matches the implemented behavior (link update PR if changes are needed)

### Before requesting review
- [x] I have reviewed the code myself
- [x] I have created follow-up issues caused by this PR and linked them
here

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Changed
 
 - [2653](https://github.com/FuelLabs/fuel-core/pull/2653): Added cleaner error for wasm-executor upon failed deserialization.
+- [2705](https://github.com/FuelLabs/fuel-core/pull/2705): Update the default value for `--max-block-size` and `--max-transmit-size` to 50 MB
 
 
 ## [Version 0.41.6]

bin/fuel-core/src/cli/run/p2p.rs

@@ -148,7 +148,7 @@ pub struct P2PArgs {
     #[clap(long = "gossip-heartbeat-interval", default_value = "500ms", env)]
     pub gossip_heartbeat_interval: humantime::Duration,
 
-    /// The maximum byte size for each gossip (default is 18 MiB)
+    /// The maximum byte size for each gossip (default is 50 MiB)
     #[clap(long = "max-transmit-size", default_value = MAX_RESPONSE_SIZE_STR, env)]
     pub max_transmit_size: usize,
 

crates/services/p2p/src/config.rs

@@ -40,7 +40,7 @@ const REQ_RES_TIMEOUT: Duration = Duration::from_secs(20);
 /// The configuration of the ingress should be the same:
 /// - `nginx.org/client-max-body-size`
 /// - `nginx.ingress.kubernetes.io/proxy-body-size`
-pub const MAX_RESPONSE_SIZE: usize = 18 * 1024 * 1024;
+pub const MAX_RESPONSE_SIZE: usize = 50 * 1024 * 1024;
 
 /// Maximum number of blocks per request.
 pub const MAX_HEADERS_PER_REQUEST: usize = 100;