Upload test.jsonl.gz

Convert dataset to the format required by `AbsTaskClusteringFast`:
```
{"sentences": "Sentence1", "labels": ["label_level1", "label_level2",...]}
```

No more generating splits.

Removed duplicates based on article id.

test.jsonl.gz

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:c3bfe3fffd391eff0a1a166d7be14eaef7751ba0228c0f3c0f945bc841ed8678
-size 3154423
+oid sha256:9b35471c133962a4de71cf99e7c169f508396dd796bd6eda0224d3b808a8d7ef
+size 2404725