Couple blocks and blobs in gossip (#3670)

* Revert "Add more gossip verification conditions"

This reverts commit 1430b561c3.

* Revert "Add todos"

This reverts commit 91efb9d4c7.

* Revert "Reprocess blob sidecar messages"

This reverts commit 21bf3d37cd.

* Add the coupled topic

* Decode SignedBeaconBlockAndBlobsSidecar correctly

* Process Block and Blobs in beacon processor

* Remove extra blob publishing logic from vc

* Remove blob signing in vc

* Ugly hack to compile

beacon_node/lighthouse_network/src/lib.rs

@@ -15,6 +15,7 @@ pub mod peer_manager;
 pub mod rpc;
 pub mod types;
 
+pub use crate::types::SignedBeaconBlockAndBlobsSidecar;
 pub use config::gossip_max_size;
 
 use serde::{de, Deserialize, Deserializer, Serialize, Serializer};