Use blocks v3 endpoint in the VC (#4813)

* block v3 endpoint init

* block v3 flow

* block v3 flow

* continue refactor

* the full flow...

* add api logic

* add api logic

* add new endpoint version

* added v3 endpoint

* some debugging

* merge v2 flow with v3

* debugging

* tests passing

* tests passing

* revert cargo lock

* initial v3 test

* blinded payload test case passing

* fix clippy issues

* cleanup

* cleanup

* remove dead code

* fixed logs

* add block value

* block value fix

* linting

* merge unstable

* refactor

* add consensus block value

* lint

* update header name to consensus block value

* prevent setting the participation flag

* clone get_epoch_participation result

* fmt

* clone epoch participation outside of the loop

* add block v3 to vc

* add v3 logic into vc

* add produce-block-v3

* refactor based on feedback

* update

* remove comments

* refactor

* header bugfix

* fmt

* resolve merge conflicts

* fix merge

* fix merge

* refactor

* refactor

* cleanup

* lint

* changes based on feedback

* revert

* remove block v3 fallback to v2

* publish_block_v3 should return irrecoveerable errors

* comments

* comments

* fixed issues from merge

* merge conflicts

* Don't activate at fork; support builder_proposals

* Update CLI flags & book

* Remove duplicate `current_slot` parameter in `publish_block` function, and remove unnecessary clone.

* Revert changes on making block errors irrecoverable.

---------

Co-authored-by: Michael Sproul <michael@sigmaprime.io>
Co-authored-by: Jimmy Chen <jchen.tc@gmail.com>

validator_client/src/validator_store.rs

@@ -97,6 +97,7 @@ pub struct ValidatorStore<T, E: EthSpec> {
     fee_recipient_process: Option<Address>,
     gas_limit: Option<u64>,
     builder_proposals: bool,
+    produce_block_v3: bool,
     task_executor: TaskExecutor,
     _phantom: PhantomData<E>,
 }
@@ -128,6 +129,7 @@ impl<T: SlotClock + 'static, E: EthSpec> ValidatorStore<T, E> {
             fee_recipient_process: config.fee_recipient,
             gas_limit: config.gas_limit,
             builder_proposals: config.builder_proposals,
+            produce_block_v3: config.produce_block_v3,
             task_executor,
             _phantom: PhantomData,
         }
@@ -336,6 +338,10 @@ impl<T: SlotClock + 'static, E: EthSpec> ValidatorStore<T, E> {
         self.spec.fork_at_epoch(epoch)
     }
 
+    pub fn produce_block_v3(&self) -> bool {
+        self.produce_block_v3
+    }
+
     /// Returns a `SigningMethod` for `validator_pubkey` *only if* that validator is considered safe
     /// by doppelganger protection.
     fn doppelganger_checked_signing_method(