Adding ragged metadata to `info.json`

[shrivaths16]

Description

To have information if the output tensors in the frozen graph file that is generated is either ragged or not, unragged_outputs is added to the info.json file that is generated as part of the model export.

Types of changes

• [ ] Bugfix
• [ ] New feature
• [ ] Refactor / Code style update (no logical changes)
• [ ] Build / CI changes
• [ ] Documentation Update
• [ ] Other (explain)

Does this address any currently open issues?

[list open issues here]

Outside contributors checklist

• [ ] Review the guidelines for contributing to this repository
• [ ] Read and sign the CLA and add yourself to the authors list
• [ ] Make sure you are making a pull request against the develop branch (not main). Also you should start your branch off develop
• [ ] Add tests that prove your fix is effective or that your feature works
• [ ] Add necessary documentation (if appropriate)

Thank you for contributing to SLEAP!

:heart:

[codecov[bot]]

Codecov Report

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

Project coverage is 74.12%. Comparing base (7ed1229) to head (f4cd54d). Report is 3 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1765 +/- ## =========================================== + Coverage 73.30% 74.12% +0.81% =========================================== Files 134 134 Lines 24087 24459 +372 =========================================== + Hits 17658 18131 +473 + Misses 6429 6328 -101 ```

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