Fix request count check for BadHttpMethod

This was incorrectly checking the first request ever instead of
the first request for the connection

#10055 (comment)

aiohttp/web_protocol.py

@@ -713,11 +713,7 @@ def handle_error(
         Returns HTTP response with specific status code. Logs additional
         information. It always closes current connection.
         """
-        if (
-            self._manager
-            and self._manager.requests_count == 1
-            and isinstance(exc, BadHttpMethod)
-        ):
+        if self._request_count == 1 and isinstance(exc, BadHttpMethod):
             # BadHttpMethod is common when a client sends non-HTTP
             # or encrypted traffic to an HTTP port. This is expected
             # to happen when connected to the public internet so we log