Changes for devnet-8 (#4518)

* Addressed #4487

Add override threshold flag
Added tests for Override Threshold Flag
Override default shown in decimal

* Addressed #4445

Addressed Jimmy's Comments
No need for matches
Fix Mock Execution Engine Tests
Fix clippy
fix fcuv3 bug

* Fix Block Root Calculation post-Deneb

* Addressed #4444

Attestation Verification Post-Deneb
Fix Gossip Attestation Verification Test

* Addressed #4443

Fix Exit Signing for EIP-7044
Fix cross exit test
Move 7044 Logic to signing_context()

* Update EF Tests

* Addressed #4560

* Added Comments around EIP7045

* Combine Altair Deneb to Eliminate Duplicated Code

consensus/state_processing/src/per_block_processing/process_operations.rs

@@ -95,7 +95,7 @@ pub mod base {
     }
 }
 
-pub mod altair {
+pub mod altair_deneb {
     use super::*;
     use crate::common::update_progressive_balances_cache::update_progressive_balances_on_attestation;
     use types::consts::altair::TIMELY_TARGET_FLAG_INDEX;
@@ -269,7 +269,7 @@ pub fn process_attestations<T: EthSpec, Payload: AbstractExecPayload<T>>(
         | BeaconBlockBodyRef::Merge(_)
         | BeaconBlockBodyRef::Capella(_)
         | BeaconBlockBodyRef::Deneb(_) => {
-            altair::process_attestations(
+            altair_deneb::process_attestations(
                 state,
                 block_body.attestations(),
                 verify_signatures,