feat: make more block types generic (#12812)

examples/beacon-api-sidecar-fetcher/src/mined_sidecar.rs

@@ -98,6 +98,7 @@ where
     fn process_block(&mut self, block: &SealedBlockWithSenders) {
         let txs: Vec<_> = block
             .transactions()
+            .iter()
             .filter(|tx| tx.is_eip4844())
             .map(|tx| (tx.clone(), tx.blob_versioned_hashes().unwrap().len()))
             .collect();
@@ -191,6 +192,7 @@ where
                             for (_, block) in old.blocks().iter() {
                                 let txs: Vec<BlobTransactionEvent> = block
                                     .transactions()
+                                    .iter()
                                     .filter(|tx: &&reth::primitives::TransactionSigned| {
                                         tx.is_eip4844()
                                     })