View Hyperparameter nonetype fix

[shrivaths16]

Description

Previously, while trying to view the hyperparameters of trained models, the window did not open and threw a NoneType error. This was due to the cfg_getter that was not passed from the metrics.py to the dialogs.py in order to fetch the configs file to read the hyperparameters. Hence, passing the cfg_getter to avoid the NoneType error.

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!

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 74.09%. Comparing base (7ed1229) to head (4cbd34a). Report is 3 commits behind head on develop.

Files	Patch %	Lines
sleap/gui/dialogs/metrics.py	0.00%	1 Missing :warning:
sleap/gui/learning/dialog.py	50.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1766 +/- ## =========================================== + Coverage 73.30% 74.09% +0.78% =========================================== Files 134 134 Lines 24087 24459 +372 =========================================== + Hits 17658 18123 +465 + Misses 6429 6336 -93 ```

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