bug(forks): add valid opcodes for Osaka (#1827)

Author: gurukamath

src/ethereum_test_forks/forks/forks.py

@@ -1375,6 +1375,15 @@ def is_deployed(cls) -> bool:
         """
         return False
 
+    @classmethod
+    def valid_opcodes(
+        cls,
+    ) -> List[Opcodes]:
+        """Return list of Opcodes that are valid to work on this fork."""
+        return [
+            Opcodes.CLZ,
+        ] + super(Prague, cls).valid_opcodes()
+
     @classmethod
     def solc_min_version(cls) -> Version:
         """Return minimum version of solc that supports this fork."""