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

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

beacon_node/beacon_chain/src/attestation_verification/batch.rs

@@ -66,7 +66,6 @@ where
             .ok_or(BeaconChainError::ValidatorPubkeyCacheLockTimeout)?;
 
         let mut signature_sets = Vec::with_capacity(num_indexed * 3);
-
         // Iterate, flattening to get only the `Ok` values.
         for indexed in indexing_results.iter().flatten() {
             let signed_aggregate = &indexed.signed_aggregate;