Update EF tests to spec v1.5.0-beta.2 (#6958)

Update spec tests for recent v1.5.0-beta.2 release. There are no substantial changes for Electra and earlier, and the Fulu test updates to be made are tracked here:

- https://github.com/sigp/lighthouse/issues/6957


  - Add `SingleAttestation` SSZ tests
- Add new `deposit_with_reorg` fork choice tests
- Update tag to v1.5.0-beta.2
- Ignore Fulu tests

testing/ef_tests/check_all_files_accessed.py

@@ -49,9 +49,8 @@ excluded_paths = [
     "bls12-381-tests/hash_to_G2",
     "tests/.*/eip6110",
     "tests/.*/whisk",
-    # TODO(electra): SingleAttestation tests are waiting on Eitan's PR
-    "tests/.*/electra/ssz_static/SingleAttestation",
-    "tests/.*/fulu/ssz_static/SingleAttestation",
+    # TODO(das): Fulu tests are ignored for now
+    "tests/.*/fulu",
     "tests/.*/fulu/ssz_static/MatrixEntry",
 ]