Add logging info about Shopify request

The shopify_app does not generate any logging except the raw info from httpx.
(grafted from d714021b449cf35300aae970475f19c121c4effb)

--HG--
branch : 8.0

modules/web_shop_shopify/web.py

@@ -327,6 +327,12 @@ class Shop(metaclass=PoolMeta):
                 if log.detail:
                     msg.append(log.detail)
             raise GraphQLException("\n".join(msg))
+        logger.info("shopify request %s", format_args(
+                query, {
+                    'variables': variables,
+                    'headers': headers,
+                    'max_retries': max_retries,
+                    }, logger.isEnabledFor(logging.DEBUG)))
         if user_errors:
             names = user_errors.split('.')
             errors = result.data