Rust 1.85 lints (#7019)

N/A


  2 changes:
1. Replace Option::map_or(true, ...) with is_none_or(...)
2. Remove unnecessary `Into::into` blocks where the type conversion is apparent from the types

beacon_node/genesis/src/eth1_genesis_service.rs

@@ -263,7 +263,7 @@ impl Eth1GenesisService {
             // again later.
             if eth1_service
                 .highest_safe_block()
-                .map_or(true, |n| block.number > n)
+                .is_none_or(|n| block.number > n)
             {
                 continue;
             }