Fix failing attestation tests and misc electra attestation cleanup (#5810)

* - get attestation related beacon chain tests to pass
- observed attestations are now keyed off of data + committee index
- rename op pool attestationref to compactattestationref
- remove unwraps in agg pool and use options instead
- cherry pick some changes from ef-tests-electra

* cargo fmt

* fix failing test

* Revert dockerfile changes

* make committee_index return option

* function args shouldnt be a ref to attestation ref

* fmt

* fix dup imports

---------

Co-authored-by: realbigsean <seananderson33@GMAIL.com>

beacon_node/beacon_chain/src/errors.rs

@@ -226,6 +226,8 @@ pub enum BeaconChainError {
     LightClientError(LightClientError),
     UnsupportedFork,
     MilhouseError(MilhouseError),
+    AttestationError(AttestationError),
+    AttestationCommitteeIndexNotSet,
 }
 
 easy_from_to!(SlotProcessingError, BeaconChainError);
@@ -256,6 +258,7 @@ easy_from_to!(AvailabilityCheckError, BeaconChainError);
 easy_from_to!(EpochCacheError, BeaconChainError);
 easy_from_to!(LightClientError, BeaconChainError);
 easy_from_to!(MilhouseError, BeaconChainError);
+easy_from_to!(AttestationError, BeaconChainError);
 
 #[derive(Debug)]
 pub enum BlockProductionError {