Unpin Python 3.13 and 3.14 (#15634)

stdlib/@tests/stubtest_allowlists/darwin-py313.txt

@@ -1,3 +1,13 @@
+# =============
+# 3.13 and 3.14
+# =============
+
+# Starting with Python 3.13.13, these methods accept None for the "scheduler"
+# and "setpgroup" parameters, but would raise a TypeError with Python 3.13.12
+# and earlier. For compatibility reasons, we don't allow None in the stubs.
+os.posix_spawn
+os.posix_spawnp
+
 # =======
 # >= 3.13
 # =======

stdlib/@tests/stubtest_allowlists/darwin-py314.txt

@@ -1,3 +1,13 @@
+# =============
+# 3.13 and 3.14
+# =============
+
+# Starting with Python 3.14.4, these methods accept None for the "scheduler"
+# and "setpgroup" parameters, but would raise a TypeError with Python 3.13.12
+# and earlier. For compatibility reasons, we don't allow None in the stubs.
+os.posix_spawn
+os.posix_spawnp
+
 # =========
 # 3.14 only
 # =========

stdlib/@tests/stubtest_allowlists/linux-py313.txt

@@ -0,0 +1,9 @@
+# =============
+# 3.13 and 3.14
+# =============
+
+# Starting with Python 3.13.13, these methods accept None for the "scheduler"
+# and "setpgroup" parameters, but would raise a TypeError with Python 3.13.12
+# and earlier. For compatibility reasons, we don't allow None in the stubs.
+os.posix_spawn
+os.posix_spawnp

stdlib/@tests/stubtest_allowlists/linux-py314.txt

@@ -1,3 +1,13 @@
+# =============
+# 3.13 and 3.14
+# =============
+
+# Starting with Python 3.14.4, these methods accept None for the "scheduler"
+# and "setpgroup" parameters, but would raise a TypeError with Python 3.13.12
+# and earlier. For compatibility reasons, we don't allow None in the stubs.
+os.posix_spawn
+os.posix_spawnp
+
 # =========
 # 3.14 only
 # =========