Rust 1.84 lints (#6781)

* Fix few lints

* Fix remaining lints

* Use fully qualified syntax

beacon_node/execution_layer/src/test_utils/mock_execution_layer.rs

@@ -318,7 +318,7 @@ impl<E: EthSpec> MockExecutionLayer<E> {
         (self, block_hash)
     }
 
-    pub async fn with_terminal_block<'a, U, V>(self, func: U) -> Self
+    pub async fn with_terminal_block<U, V>(self, func: U) -> Self
     where
         U: Fn(ChainSpec, ExecutionLayer<E>, Option<ExecutionBlock>) -> V,
         V: Future<Output = ()>,