ref(types): Correct ExcInfo type

Previously, we defined `ExcInfo` as `tuple[Type[BaseException] | None, BaseException | None, TracebackType | None]`, when in fact, the correct type is the narrower `tuple[Type[BaseException], BaseException, TracebackType] | tuple[None, None, None]`.

sentry_sdk/_types.py

@@ -121,8 +121,9 @@
         total=False,
     )
 
-    ExcInfo = Tuple[
-        Optional[Type[BaseException]], Optional[BaseException], Optional[TracebackType]
+    ExcInfo = Union[
+        tuple[Type[BaseException], BaseException, TracebackType],
+        tuple[None, None, None],
     ]
 
     Hint = Dict[str, Any]