Add `Ord` and `PartialOrd` to ConfigSvn and IsvSvn

[nick-mobilecoin]

Current dependencies on/for this PR:

• main
  • PR #449
  • PR #450 👈
    • PR #452

This stack of pull requests is managed by Graphite.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (20ae7a6) 88.39% compared to head (512da98) 88.39%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## nick/update-ci #450 +/- ## =============================================== Coverage 88.39% 88.39% =============================================== Files 40 40 Lines 5663 5663 =============================================== Hits 5006 5006 Misses 657 657 ```

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