Address @jtraglia's comments regarding Electra code (#14833)

* change field IDs in `AggregateAttestationAndProofElectra`

* fix typo in `validator.proto`

* correct slashing indices length and shashings length

* check length in indexed attestation's `ToConsensus` method

* use `fieldparams.BLSSignatureLength`

* Add length checks for execution request

* fix typo in `beacon_state.proto`

* fix typo in `ssz_proto_library.bzl`

* fix error messages about incorrect types in block factory

* add Electra case to `BeaconBlockContainerToSignedBeaconBlock`

* move PeerDAS config items to PeerDAS section

* remove redundant params

* rename `PendingDepositLimit` to `PendingDepositsLimit`

* improve requests unmarshaling errors

* rename `get_validator_max_effective_balance` to `get_max_effective_balance`

* fix typo in `consolidations.go`

* rename `index` to `validator_index` in `PendingPartialWithdrawal`

* rename `randomByte` to `randomBytes` in `validators.go`

* fix for version in a comment in `validator.go`

* changelog <3

* Revert "rename `index` to `validator_index` in `PendingPartialWithdrawal`"

This reverts commit 87e4da0ea2.

beacon-chain/state/state-native/getters_withdrawal.go

@@ -95,7 +95,7 @@ func (b *BeaconState) NextWithdrawalValidatorIndex() (primitives.ValidatorIndex,
 //					index=withdrawal_index,
 //					validator_index=validator_index,
 //					address=ExecutionAddress(validator.withdrawal_credentials[12:]),
-//					amount=balance - get_validator_max_effective_balance(validator),  # [Modified in Electra:EIP7251]
+//					amount=balance - get_max_effective_balance(validator),  # [Modified in Electra:EIP7251]
 //				))
 //				withdrawal_index += WithdrawalIndex(1)
 //			if len(withdrawals) == MAX_WITHDRAWALS_PER_PAYLOAD: