Add Fulu boilerplate (#6695)

* Add Fulu boilerplate

* Add more boilerplate

* Change fulu_time to osaka_time

* Merge branch 'unstable' into fulu-boilerplate

* Fix tests

* Merge branch 'unstable' into fulu-boilerplate

* More test fixes

* Apply suggestions

* Remove `get_payload` boilerplate

* Add lightclient fulu types and fix beacon-chain-tests

* Disable Fulu in ef-tests

* Reduce boilerplate for future forks

* Small fixes

* One more fix

* Apply suggestions

* Merge branch 'unstable' into fulu-boilerplate

* Fix lints

consensus/state_processing/src/per_slot_processing.rs

@@ -1,6 +1,6 @@
 use crate::upgrade::{
     upgrade_to_altair, upgrade_to_bellatrix, upgrade_to_capella, upgrade_to_deneb,
-    upgrade_to_electra,
+    upgrade_to_electra, upgrade_to_fulu,
 };
 use crate::{per_epoch_processing::EpochProcessingSummary, *};
 use safe_arith::{ArithError, SafeArith};
@@ -71,6 +71,11 @@ pub fn per_slot_processing<E: EthSpec>(
             upgrade_to_electra(state, spec)?;
         }
 
+        // Fulu.
+        if spec.fulu_fork_epoch == Some(state.current_epoch()) {
+            upgrade_to_fulu(state, spec)?;
+        }
+
         // Additionally build all caches so that all valid states that are advanced always have
         // committee caches built, and we don't have to worry about initialising them at higher
         // layers.