Add save config function

[saeliddp]

What does this PR do?

This PR addresses a few of the issues with cyto-dl/plugin integration that we uncovered on Friday.

1. Require a new version of bioio
2. Add a save_config function to the existing API so that we can save the config with the overrides, not just the default config

Testing

I tested these changes on a sandbox branch of the plugin, manually verifying that prediction could be started up with a config saved using save_config during training.

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Did you have fun?

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[benjijamorris]

sweet!

[yrkim98]

thanks!