Use TypeAlias where possible for type aliases (#7630)

stubs/python-dateutil/dateutil/parser/__init__.pyi

@@ -1,9 +1,10 @@
 from datetime import datetime, tzinfo
 from typing import IO, Any, Mapping, Text
+from typing_extensions import TypeAlias
 
 from .isoparser import isoparse as isoparse, isoparser as isoparser
 
-_FileOrStr = bytes | Text | IO[str] | IO[Any]
+_FileOrStr: TypeAlias = bytes | Text | IO[str] | IO[Any]
 
 class parserinfo(object):
     JUMP: list[str]

stubs/python-dateutil/dateutil/parser/isoparser.pyi

@@ -1,9 +1,10 @@
 from _typeshed import SupportsRead
 from datetime import date, datetime, time, tzinfo
 from typing import Text
+from typing_extensions import TypeAlias
 
-_Readable = SupportsRead[Text | bytes]
-_TakesAscii = Text | bytes | _Readable
+_Readable: TypeAlias = SupportsRead[Text | bytes]
+_TakesAscii: TypeAlias = Text | bytes | _Readable
 
 class isoparser:
     def __init__(self, sep: Text | bytes | None = ...): ...

stubs/python-dateutil/dateutil/tz/tz.pyi

@@ -1,10 +1,11 @@
 import datetime
 from typing import IO, Any, Text, TypeVar
+from typing_extensions import TypeAlias
 
 from ..relativedelta import relativedelta
 from ._common import _tzinfo as _tzinfo, enfold as enfold, tzname_in_python2 as tzname_in_python2, tzrangebase as tzrangebase
 
-_FileObj = str | Text | IO[str] | IO[Text]
+_FileObj: TypeAlias = str | Text | IO[str] | IO[Text]
 _DT = TypeVar("_DT", bound=datetime.datetime)
 
 ZERO: datetime.timedelta