Rust 1.84 lints (#6781)

* Fix few lints

* Fix remaining lints

* Use fully qualified syntax

beacon_node/lighthouse_network/gossipsub/src/backoff.rs

@@ -124,7 +124,7 @@ impl BackoffStorage {
     pub(crate) fn is_backoff_with_slack(&self, topic: &TopicHash, peer: &PeerId) -> bool {
         self.backoffs
             .get(topic)
-            .map_or(false, |m| m.contains_key(peer))
+            .is_some_and(|m| m.contains_key(peer))
     }
 
     pub(crate) fn get_backoff_time(&self, topic: &TopicHash, peer: &PeerId) -> Option<Instant> {

beacon_node/lighthouse_network/gossipsub/src/behaviour.rs

@@ -1770,8 +1770,7 @@ where
         // reject messages claiming to be from ourselves but not locally published
         let self_published = !self.config.allow_self_origin()
             && if let Some(own_id) = self.publish_config.get_own_id() {
-                own_id != propagation_source
-                    && raw_message.source.as_ref().map_or(false, |s| s == own_id)
+                own_id != propagation_source && raw_message.source.as_ref() == Some(own_id)
             } else {
                 self.published_message_ids.contains(msg_id)
             };