feat(parquetconverter): add support for additional sort columns during Parquet file generation

[Angith]

What this PR does:

Which issue(s) this PR fixes:
Fixes #6941

Checklist

• Tests updated
• Documentation added
• CHANGELOG.md updated - the order of entries should be [CHANGE], [FEATURE], [ENHANCEMENT], [BUGFIX]

[Angith]

Hi @yeya24

I’ve raised this PR to add support for additional sort columns during Parquet file generation. A few points I wanted to clarify:

• As per the contributing guide, I ran make doc, but it ended up deleting some other important documents. I also ran goimports, but it reformatted ~700 files, including files in the vendor folder. I assume these shouldn’t be committed, so I left those changes out. Could you please confirm the expected workflow here?
• I’ve written unit tests for the new functionality and verified, but I haven’t yet tested the change end-to-end. Could you guide me on how to run the full end-to-end tests for Cortex to validate this change?

Thanks in advance for your guidance 🙏