Gloas spec v1.7.0-alpha.5 and beacon_chain tests (#8998)

Fix database pruning post-Gloas


  - Fix DB pruning logic (and state summaries DAG)
- Get the `beacon_chain` tests running with `FORK_NAME=gloas` 🎉


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

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

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

Co-Authored-By: dapplion <35266934+dapplion@users.noreply.github.com>

Co-Authored-By: Eitan Seri-Levi <eserilev@ucsc.edu>

beacon_node/beacon_chain/tests/attestation_verification.rs

@@ -1389,13 +1389,18 @@ async fn attestation_to_finalized_block() {
     let earlier_block_root = earlier_block.canonical_root();
     assert_ne!(earlier_block_root, finalized_checkpoint.root);
 
+    // For Gloas, `block.state_root()` returns the pending state root, but the cold DB
+    // may store the full state root. Use `get_cold_state_root` to get the actual stored key.
+    let cold_state_root = harness
+        .chain
+        .store
+        .get_cold_state_root(earlier_slot)
+        .expect("should not error getting cold state root")
+        .expect("cold state root should be present for finalized slot in archive store");
+
     let mut state = harness
         .chain
-        .get_state(
-            &earlier_block.state_root(),
-            Some(earlier_slot),
-            CACHE_STATE_IN_TESTS,
-        )
+        .get_state(&cold_state_root, Some(earlier_slot), CACHE_STATE_IN_TESTS)
         .expect("should not error getting state")
         .expect("should find state");