Add HAS_PHA to _ssl (#14033)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: sobolevn

stdlib/@tests/stubtest_allowlists/py314.txt

@@ -16,7 +16,6 @@ _heapq.heapreplace_max
 _imp.pyc_magic_number_token
 _socket.IP_RECVTTL
 _socket.if_indextoname
-_ssl.HAS_PHA
 _thread.RLock.locked
 _thread.set_name
 ast.Interpolation

stdlib/_ssl.pyi

@@ -283,6 +283,8 @@ HAS_TLSv1: bool
 HAS_TLSv1_1: bool
 HAS_TLSv1_2: bool
 HAS_TLSv1_3: bool
+if sys.version_info >= (3, 14):
+    HAS_PHA: bool
 
 # version info
 OPENSSL_VERSION_NUMBER: int