What does this PR do?

Refactors find_tied_parameters to a simpler and faster implementation by grouping parameter names that share the same parameter object.

Fixes # N/A

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• [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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• [ ] Did you write any new necessary tests?

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@sunmarc, could you please let me know the changes required here? Thanks!