fix(warning): future distutils deprecation (#921)

Author: nayaverdier

Diff for: aws_lambda_powertools/shared/functions.py

@@ -1,7 +1,16 @@
-from distutils.util import strtobool
 from typing import Any, Optional, Union
 
 
+def strtobool(value):
+    value = value.lower()
+    if value in ("y", "yes", "t", "true", "on", "1"):
+        return 1
+    elif value in ("n", "no", "f", "false", "off", "0"):
+        return 0
+    else:
+        raise ValueError("invalid truth value %r" % (value,))
+
+
 def resolve_truthy_env_var_choice(env: str, choice: Optional[bool] = None) -> bool:
     """Pick explicit choice over truthy env value, if available, otherwise return truthy env value