Add deepcopy to retries

Author: SamRemis

packages/smithy-core/src/smithy_core/retries.py

@@ -6,7 +6,7 @@
 from dataclasses import dataclass
 from enum import Enum
 from functools import lru_cache
-from typing import Literal
+from typing import Any, Literal
 
 from .exceptions import RetryError
 from .interfaces import retries as retries_interface
@@ -295,6 +295,9 @@ def refresh_retry_token_for_retry(
     def record_success(self, *, token: retries_interface.RetryToken) -> None:
         """Not used by this retry strategy."""
 
+    def __deepcopy__(self, memo: Any) -> "SimpleRetryStrategy":
+        return self
+
 
 class StandardRetryQuota:
     """Retry quota used by :py:class:`StandardRetryStrategy`."""
@@ -460,3 +463,6 @@ def record_success(self, *, token: retries_interface.RetryToken) -> None:
                 f"StandardRetryStrategy requires StandardRetryToken, got {type(token).__name__}"
             )
         self._retry_quota.release(release_amount=token.quota_acquired)
+
+    def __deepcopy__(self, memo: Any) -> "StandardRetryStrategy":
+        return self