Remove use of deprecated python 3.12 strtobool

distutils is not available in python 3.12, so a substitute is needed
for the strtobool code.

Use same resolution as implemented by the ITK project.

Signed-off-by: Hans Johnson <hans-johnson@uiowa.edu>

Author: hjmjohnson

monai/utils/misc.py

@@ -24,7 +24,6 @@
 import warnings
 from ast import literal_eval
 from collections.abc import Callable, Iterable, Sequence
-from distutils.util import strtobool
 from math import log10
 from pathlib import Path
 from typing import TYPE_CHECKING, Any, TypeVar, cast, overload
@@ -78,6 +77,25 @@
     "run_cmd",
 ]
 
+
+def _strtobool(val: str) -> bool:
+    """
+    Replaces deprecated (pre python 3.12)
+    distutils strtobool function.
+
+    True values are y, yes, t, true, on and 1;
+    False values are n, no, f, false, off and 0.
+    Raises ValueError if val is anything else.
+    """
+    val = val.lower()
+    if val in ("y", "yes", "t", "true", "on", "1"):
+        return True
+    elif val in ("n", "no", "f", "false", "off", "0"):
+        return False
+    else:
+        raise ValueError(f"invalid truth value {val}")
+
+
 _seed = None
 _flag_deterministic = torch.backends.cudnn.deterministic
 _flag_cudnn_benchmark = torch.backends.cudnn.benchmark
@@ -400,7 +418,7 @@ def _parse_var(s):
                 d[key] = literal_eval(value)
             except ValueError:
                 try:
-                    d[key] = bool(strtobool(str(value)))
+                    d[key] = bool(_strtobool(str(value)))
                 except ValueError:
                     d[key] = value
     return d