Fix broken HTTPClient.recreate code to actually clear session

discord/client.py

@@ -787,7 +787,7 @@ class Client:
         self._closed = False
         self._ready.clear()
         self._connection.clear()
-        self.http.recreate()
+        self.http.clear()
 
     async def start(self, token: str, *, reconnect: bool = True) -> None:
         """|coro|

discord/http.py

@@ -382,6 +382,10 @@ class HTTPClient:
             except AttributeError:
                 pass
 
+    def clear(self) -> None:
+        if self.__session and self.__session.closed:
+            self.__session = MISSING
+
     async def startup(self) -> None:
         if self._started:
             return
@@ -695,14 +699,6 @@ class HTTPClient:
 
     # State management
 
-    def recreate(self) -> None:
-        if self.__session and self.__session.closed:
-            self.__session = aiohttp.ClientSession(
-                connector=self.connector,
-                loop=self.loop,
-                trace_configs=None if self.http_trace is None else [self.http_trace],
-            )
-
     async def close(self) -> None:
         if self.__session:
             await self.__session.close()