Csse pyd2 modernize compute function

[loriab]

currently atop #454

Description

• [x] reworks the compute fns and user interface to handle multiple schema versions. this replaces some of checkver_and_convert's responsibilities
• [x] see also the changelog

Changelog description

Status

• [x] Code base linted
• [x] Ready to go

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 91.18457% with 32 lines in your changes missing coverage. Please review.

Project coverage is 81.58%. Comparing base (0642655) to head (1eebb5b). Report is 5 commits behind head on next2024.

Additional details and impacted files

[loriab]

Requesting review @davidbrownell, @krachwal, @rfievet, @ketanbj, @varun646, @jyoung3131