Add __slots__ to third-party packages using stubdefaulter (#14619)

stubs/python-dateutil/dateutil/_common.pyi

@@ -1,6 +1,7 @@
 from typing_extensions import Self
 
 class weekday:
+    __slots__ = ["weekday", "n"]
     def __init__(self, weekday: int, n: int | None = None) -> None: ...
     def __call__(self, n: int) -> Self: ...
     def __eq__(self, other: object) -> bool: ...

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

@@ -108,6 +108,7 @@ def parse(
 
 class _tzparser:
     class _result(_resultbase):
+        __slots__ = ["stdabbr", "stdoffset", "dstabbr", "dstoffset", "start", "end"]
         stdabbr: str | None
         stdoffset: int | None
         dstabbr: str | None
@@ -116,6 +117,7 @@ class _tzparser:
         end: _attr
 
         class _attr(_resultbase):
+            __slots__ = ["month", "week", "weekday", "yday", "jyday", "day", "time"]
             month: int | None
             week: int | None
             weekday: int | None

stubs/python-dateutil/dateutil/rrule.pyi

@@ -112,6 +112,23 @@ class rrule(rrulebase):
 _RRule: TypeAlias = rrule
 
 class _iterinfo:
+    __slots__ = [
+        "rrule",
+        "lastyear",
+        "lastmonth",
+        "yearlen",
+        "nextyearlen",
+        "yearordinal",
+        "yearweekday",
+        "mmask",
+        "mrange",
+        "mdaymask",
+        "nmdaymask",
+        "wdaymask",
+        "wnomask",
+        "nwdaymask",
+        "eastermask",
+    ]
     rrule: _RRule
     def __init__(self, rrule: _RRule) -> None: ...
     yearlen: int | None

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

@@ -56,6 +56,7 @@ class tzlocal(_tzinfo):
     __reduce__ = object.__reduce__
 
 class _ttinfo:
+    __slots__ = ["offset", "delta", "isdst", "abbr", "isstd", "isgmt", "dstoffset"]
     offset: float
     delta: timedelta
     isdst: bool