chore: import upstream snapshot with attribution

python/ray/_private/authentication/authentication_token_generator.py

@@ -0,0 +1,9 @@
+import secrets
+
+
+def generate_new_authentication_token() -> str:
+    """Generate an authentication token for the cluster.
+
+    256 bits of entropy is considered sufficient to be durable to brute force attacks.
+    """
+    return secrets.token_hex(32)