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>

lighthouse/tests/validator_client.rs

@@ -421,6 +421,21 @@ fn no_doppelganger_protection_flag() {
         .run()
         .with_config(|config| assert!(!config.enable_doppelganger_protection));
 }
+#[test]
+fn produce_block_v3_flag() {
+    CommandLineTest::new()
+        .flag("produce-block-v3", None)
+        .run()
+        .with_config(|config| assert!(config.produce_block_v3));
+}
+
+#[test]
+fn no_produce_block_v3_flag() {
+    CommandLineTest::new()
+        .run()
+        .with_config(|config| assert!(!config.produce_block_v3));
+}
+
 #[test]
 fn no_gas_limit_flag() {
     CommandLineTest::new()