Parquet files separated into 3 chunks

Dataset sources
| Rain     | Snow     | Raindrop   |        | Haze        |
|----------|----------|------------|--------|-------------|
| RealRain-1K | Snow100K | DeRaindrop | RainDS | RESIDE-beta |
| 784      | 1500     | 861        | 350    | 1462        |