Allow more flexible run names in MLflowCallback #209
Description
Motivation
The naming of runs generated by MLflowCallback is not very flexible.
Description
At the moment it is the trial number (by default) or a string:
It would be nice to allow the user to pass a callable that takes the trial as an input to allow full customization.
Alternatives (optional)
No response
Additional context (optional)
I am happy to take this on and submit a small PR :)