Fix for str_to_bool definition in testing utils (huggingface#7461)

update

src/diffusers/utils/testing_utils.py

@@ -141,6 +141,22 @@ def get_tests_dir(append_path=None):
         return tests_dir
 
 
+# Taken from the following PR:
+# https://github.com/huggingface/accelerate/pull/1964
+def str_to_bool(value) -> int:
+    """
+    Converts a string representation of truth to `True` (1) or `False` (0).
+    True values are `y`, `yes`, `t`, `true`, `on`, and `1`; False value are `n`, `no`, `f`, `false`, `off`, and `0`;
+    """
+    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(f"invalid truth value {value}")
+
+
 def parse_flag_from_env(key, default=False):
     try:
         value = os.environ[key]
@@ -920,22 +936,6 @@ def backend_supports_training(device: str):
     return BACKEND_SUPPORTS_TRAINING[device]
 
 
-# Taken from the following PR:
-# https://github.com/huggingface/accelerate/pull/1964
-def str_to_bool(value) -> int:
-    """
-    Converts a string representation of truth to `True` (1) or `False` (0).
-    True values are `y`, `yes`, `t`, `true`, `on`, and `1`; False value are `n`, `no`, `f`, `false`, `off`, and `0`;
-    """
-    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(f"invalid truth value {value}")
-
-
 # Guard for when Torch is not available
 if is_torch_available():
     # Update device function dict mapping