fixing file extension issue on SqlToS3Operator

[arvindp25]

---

1. Fix file extension issue on SqlToS3Operator in amazon provider.
   Now loaded file have proper extension. refer below table to understand for extension
   | File Format | Extension |
   |------------------|--------------|
   | CSV | .csv |
   | CSV (gzip) | .csv.gz |
   | JSON | .json |
   | JSON (gzip) | .json.gz |
   | Parquet | .parquet |
   | Parquet (gzip) | .parquet |

updated and refactor unittest case for the same and added more

closes: #53976
related: #53976
POW:-

1. without groupby_kwargs

pow_without_groupby.mp4

2. with groupby_kwargs
   https://github.com/user-attachments/assets/fa110550-72f9-40ec-bf05-e4d49dd58b7c

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[guan404ming]

LGTM, one nit.

[o-nikolas]

This is going to change the user experience, but I think we can definitely catalogue this one as a bug fix.

[bryanyang0528]

It's a breaking change.
We named our file with .tsv
Now, every file becomes .tsv.csv...

[o-nikolas]

It's a breaking change. We named our file with .tsv Now, every file becomes .tsv.csv...

@bryanyang0528 Can you create a Github Issue with more details and reproduction steps. Thanks!