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/beacon_chain/src/data_availability_checker/overflow_lru_cache.rs

@@ -307,7 +307,6 @@ impl<E: EthSpec> PendingComponents<E> {
                 .map(|b| b.map(|b| b.to_blob()))
                 .take(num_blobs_expected)
                 .collect::<Option<Vec<_>>>()
-                .map(Into::into)
             else {
                 return Err(AvailabilityCheckError::Unexpected);
             };