Add convenience function to generate inference model from training checkpoint file

[wiederm]

Pull Request Summary

This PR adds a function that creates a torchscript model from a checkpoint file and sets the right hyperparameters.

Associated Issue(s)

• Issue Make it easier to construct inference model from training checkpoint file #284

Pull Request Checklist

• Issue(s) raised/addressed and linked
• Includes appropriate unit test(s)
• Appropriate docstring(s) added/updated
• Appropriate .rst doc file(s) added/updated
• PR is ready for review

[codecov-commenter]

Codecov Report

❌ Patch coverage is 92.59259% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.33%. Comparing base (9b3ed45) to head (767d7c5).
⚠️ Report is 809 commits behind head on main.

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