feat: get attestations for electra block (#6732)

* feat: getAttestationsForBlock() for electra

* chore: fix lint

* fix: MAX_ATTESTATIONS_PER_GROUP_ELECTRA and address PR comments

* chore: unit test aggregateConsolidation

* Fix rebase mistake

* Address my own comment :)

---------

Co-authored-by: Navie Chan <naviechan@gmail.com>

packages/beacon-node/src/chain/blocks/importBlock.ts

@@ -1,6 +1,6 @@
 import {toHexString} from "@chainsafe/ssz";
 import {capella, ssz, allForks, altair} from "@lodestar/types";
-import {ForkName, ForkSeq, INTERVALS_PER_SLOT, MAX_SEED_LOOKAHEAD, SLOTS_PER_EPOCH} from "@lodestar/params";
+import {ForkSeq, INTERVALS_PER_SLOT, MAX_SEED_LOOKAHEAD, SLOTS_PER_EPOCH} from "@lodestar/params";
 import {
   CachedBeaconStateAltair,
   computeEpochAtSlot,
@@ -433,7 +433,10 @@ export async function importBlock(
     }
     if (this.emitter.listenerCount(routes.events.EventType.attesterSlashing)) {
       for (const attesterSlashing of block.message.body.attesterSlashings) {
-        this.emitter.emit(routes.events.EventType.attesterSlashing, {version: this.config.getForkName(blockSlot), data: attesterSlashing});
+        this.emitter.emit(routes.events.EventType.attesterSlashing, {
+          version: this.config.getForkName(blockSlot),
+          data: attesterSlashing,
+        });
       }
     }
     if (this.emitter.listenerCount(routes.events.EventType.proposerSlashing)) {