sqlite3: Avoid optional type for 'description' (#7842)

Use the `| Any` trick instead, since it seems that in a lot of
code the value can be predicted to be non-`None` (if a query
has been executed previously, I think).

The docs don't mention the possibility of this being `None`, so
it seems likely that a lot of code doesn't check for it:
https://docs.python.org/3/library/sqlite3.html#sqlite3.Cursor.description

stdlib/sqlite3/dbapi2.pyi

@@ -374,8 +374,9 @@ class Cursor(Iterator[Any]):
     arraysize: int
     @property
     def connection(self) -> Connection: ...
+    # May be None, but using | Any instead to avoid slightly annoying false positives.
     @property
-    def description(self) -> tuple[tuple[str, None, None, None, None, None, None], ...] | None: ...
+    def description(self) -> tuple[tuple[str, None, None, None, None, None, None], ...] | Any: ...
     @property
     def lastrowid(self) -> int | None: ...
     row_factory: Callable[[Cursor, Row[Any]], object] | None