Update to consensus spec v1.4.0-beta.6 (#5094)

* get latest ef tests passing

* fix tests

* Fix invalid payload recovery tests

* Merge branch 'unstable' into update-to-spec-v1.4.0-beta.6

* Revert "fix tests"

This reverts commit 0c875b02e0.

* Fix fork choice def. tests

* Update beacon_node/beacon_chain/tests/payload_invalidation.rs

testing/ef_tests/check_all_files_accessed.py

@@ -51,7 +51,8 @@ excluded_paths = [
     "bls12-381-tests/deserialization_G1",
     "bls12-381-tests/deserialization_G2",
     "bls12-381-tests/hash_to_G2",
-    "tests/.*/eip6110"
+    "tests/.*/eip6110",
+    "tests/.*/whisk"
 ]