* remove unused cache states map
* correct typo
* Remove unused array
* Add lock around deposits cache chainstart pubkeys
* Copy attestation before grabbing lock. This may reduce lock contention time as other callers wanting the lock do not need to wait as long for the lock to become available.
* Copy attestation before grabbing lock. This may reduce lock contention time as other callers wanting the lock do not need to wait as long for the lock to become available.
* Set capacity to 1 since it is known that the slice will be 1 after insertion
* require validatorSlashingPreconditionCheck caller to hold lock
* Add lock for voluntary exits pool HasBeenIncluded
* Require rate limiter retrieveCollector to hold lock
* Add lock requirement assertions in sync
* Remove unused struct
* remove ClearCachedStates API
* field initSyncState is unused
Co-authored-by: Raul Jordan <raul@prysmaticlabs.com>
