Update xml for 3.14 (#14119)

stdlib/@tests/stubtest_allowlists/py314.txt

@@ -66,7 +66,6 @@ multiprocessing.managers._BaseDictProxy.__ror__
 multiprocessing.managers._BaseDictProxy.fromkeys
 multiprocessing.process.BaseProcess.interrupt
 multiprocessing.synchronize.SemLock.locked
-pyexpat.errors.XML_ERROR_NOT_STARTED
 shutil.__all__
 sre_compile.CH_NEGATE
 sre_constants.CH_NEGATE
@@ -85,10 +84,6 @@ turtle.poly
 turtle.save
 types.CodeType.co_branches
 types.FrameType.f_generator
-xml.parsers.expat.errors.XML_ERROR_NOT_STARTED
-xml.sax.__all__
-xml.sax.InputSource
-
 
 # =========================
 # New errors in Python 3.14

stdlib/pyexpat/errors.pyi

@@ -49,3 +49,5 @@ if sys.version_info >= (3, 11):
     XML_ERROR_INVALID_ARGUMENT: Final[LiteralString]
     XML_ERROR_NO_BUFFER: Final[LiteralString]
     XML_ERROR_AMPLIFICATION_LIMIT_BREACH: Final[LiteralString]
+if sys.version_info >= (3, 14):
+    XML_ERROR_NOT_STARTED: Final[LiteralString]

stdlib/xml/sax/__init__.pyi

@@ -1,3 +1,4 @@
+import sys
 from _typeshed import ReadableBuffer, StrPath, SupportsRead, _T_co
 from collections.abc import Iterable
 from typing import Protocol
@@ -10,7 +11,7 @@ from xml.sax._exceptions import (
     SAXReaderNotAvailable as SAXReaderNotAvailable,
 )
 from xml.sax.handler import ContentHandler as ContentHandler, ErrorHandler as ErrorHandler
-from xml.sax.xmlreader import XMLReader
+from xml.sax.xmlreader import InputSource as InputSource, XMLReader
 
 class _SupportsReadClose(SupportsRead[_T_co], Protocol[_T_co]):
     def close(self) -> None: ...
@@ -23,3 +24,19 @@ def make_parser(parser_list: Iterable[str] = ()) -> XMLReader: ...
 def parse(source: _Source, handler: ContentHandler, errorHandler: ErrorHandler = ...) -> None: ...
 def parseString(string: ReadableBuffer | str, handler: ContentHandler, errorHandler: ErrorHandler | None = ...) -> None: ...
 def _create_parser(parser_name: str) -> XMLReader: ...
+
+if sys.version_info >= (3, 14):
+    __all__ = [
+        "ContentHandler",
+        "ErrorHandler",
+        "InputSource",
+        "SAXException",
+        "SAXNotRecognizedException",
+        "SAXNotSupportedException",
+        "SAXParseException",
+        "SAXReaderNotAvailable",
+        "default_parser_list",
+        "make_parser",
+        "parse",
+        "parseString",
+    ]