Enable late re-org and re-org interactive tests (#9405)

https://github.com/sigp/lighthouse/issues/8959

WIP still working on adding more re-org tests and refactoring existing.


  


Co-Authored-By: hopinheimer <knmanas6@gmail.com>

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

consensus/proto_array/src/proto_array.rs

@@ -174,6 +174,10 @@ pub struct ProtoNode {
 }
 
 impl ProtoNode {
+    pub fn is_gloas(&self) -> bool {
+        self.as_v29().is_ok()
+    }
+
     /// Generic version of spec's `parent_payload_status` that works for pre-Gloas nodes by
     /// considering their parents Empty.
     pub fn get_parent_payload_status(&self) -> PayloadStatus {