fix: Skip fork and forkserver on win32 (#1566)

* fix: Skip fork and forkserver on win32

* Fix fmt

Author: nuno-faria

python/tests/test_pickle_multiprocessing.py

@@ -84,11 +84,18 @@ def _skip_if_multiprocessing_unavailable():
     pytest.param(
         "fork",
         marks=pytest.mark.skipif(
-            sys.platform == "darwin",
-            reason="fork start method is unsafe with PyArrow/tokio on macOS",
+            sys.platform in ("darwin", "win32"),
+            reason="fork start method is not supported on Windows "
+            "and unsafe with PyArrow/tokio on macOS",
+        ),
+    ),
+    pytest.param(
+        "forkserver",
+        marks=pytest.mark.skipif(
+            sys.platform == "win32",
+            reason="forkserver start method is not supported on Windows",
         ),
     ),
-    "forkserver",
     "spawn",
 ]