Rename Params to Config & fix test code to new ff

[sunhuachuang]

Description

Upgrade to the latest algebra: arkworks-rs/algebra#393

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Before we can merge this PR, please make sure that all the following items have been
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• Targeted PR against correct branch (master)
• Linked to Github issue with discussion and accepted design OR have an explanation in the PR that describes this work.
• Wrote unit tests
• Updated relevant documentation in the code
• Added a relevant changelog entry to the Pending section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer

[Pratyush]

This looks good to me; @weikengchen should we merge this into your branch?

[weikengchen]

Let me take a look. I told Sun to disregard my PR and do the necessary changes all in this one.

[weikengchen]

Pratyush, I might not be able to do a review. If it looks good, feel free to merge.

[Pratyush]

Sounds good. Should I merge these into your branch, @weikengchen , or into main?

[Pratyush]

Put otherwise, @sunhuachuang, if we point this branch to the appropriate branch on curves, do things compile and pass tests?

[weikengchen]

I think let us merge it to fix-ff and see if it works.

Sun is in China and will be up in a few hours.