`run_baseline` API feature parity with `suggest_baseline`

[nigenda-amazon]

Describe the feature you'd like
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suggest_baseline API has some extra fields like baseline_dataset (which can be a plain string rather than always a ProcessingInput) and dataset_format.

Note the discrepancies versus run_baseline

How would this feature be used? Please describe.
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These extra fields are also useful for BYOC schedules, which are currently left out.

Describe alternatives you've considered
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Boto APIs can be used to recreate the missing functionality, but are not as concise. Some of these are also translated to env variables in the backend, a mapping which is tricky to ensure correctness for.

Additional context
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[akrishna1995]

We have added your feature request to our backlog of feature requests and may consider putting it into future SDK versions. I will go ahead and close the issue now, please let me know if you have any more feedback.