fix(COGS): label metrics correctly for query side (#7826)

#7815 but for query side

Author: xurui-c

snuba/querylog/__init__.py

@@ -30,7 +30,7 @@
     "TRACE_ITEM_TYPE_UPTIME_RESULT": "uptime",
     "TRACE_ITEM_TYPE_REPLAY": "replays",
     "TRACE_ITEM_TYPE_OCCURRENCE": "issueplatform",
-    "TRACE_ITEM_TYPE_METRIC": "sessions",
+    "TRACE_ITEM_TYPE_METRIC": "trace_metrics",
     "TRACE_ITEM_TYPE_PROFILE_FUNCTION": "profiles",
     "TRACE_ITEM_TYPE_ATTACHMENT": "attachments",
     "TRACE_ITEM_TYPE_PREPROD": "preprod",