Add a flag to disable getBlobs (#7853)

N/A


  Add a flag to disable get blobs. I configured the flag to disable it regardless of version because its most likely something we use for testing anyway.

beacon_node/src/config.rs

@@ -182,6 +182,10 @@ pub fn get_config<E: EthSpec>(
         client_config.chain.enable_light_client_server = false;
     }
 
+    if cli_args.get_flag("disable-get-blobs") {
+        client_config.chain.disable_get_blobs = true;
+    }
+
     if let Some(sync_tolerance_epochs) =
         clap_utils::parse_optional(cli_args, "sync-tolerance-epochs")?
     {