Add lockbud task to CI (#6470)

* Add lockbud task to CI

* Allow unknown lint

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into lockbud

* remove potential deadlock

* ignore tokio util crate

* Update image

consensus/state_processing/src/consensus_context.rs

@@ -147,6 +147,8 @@ impl<E: EthSpec> ConsensusContext<E> {
         }
     }
 
+    #[allow(unknown_lints)]
+    #[allow(elided_named_lifetimes)]
     pub fn get_indexed_attestation<'a>(
         &'a mut self,
         state: &BeaconState<E>,