Move KZG commitments from payload envelope to payload bid and spec alpha.2 (#8725)

Co-Authored-By: Eitan Seri- Levi <eserilev@gmail.com>

Co-Authored-By: Michael Sproul <michael@sigmaprime.io>

Co-Authored-By: Jimmy Chen <jchen.tc@gmail.com>

Co-Authored-By: Michael Sproul <michaelsproul@users.noreply.github.com>

testing/ef_tests/src/handler.rs

@@ -333,6 +333,10 @@ impl<T, E> SszStaticHandler<T, E> {
         Self::for_forks(ForkName::list_all()[6..].to_vec())
     }
 
+    pub fn gloas_and_later() -> Self {
+        Self::for_forks(ForkName::list_all()[7..].to_vec())
+    }
+
     pub fn pre_electra() -> Self {
         Self::for_forks(ForkName::list_all()[0..5].to_vec())
     }