New interface for algorithm's suggest() and observe() methods.

[bouthilx]

Algorithm interface for suggest() and observe() is changed to use trials instead of list of points. This will provide more flexibility when designing new algorithms. There is no impact for users, except for algorithm plugins that will not be backward compatible with previous versions of Oríon.

The factory abstract class used to create database, storage, algorithm, adapters and parallel strategy has been redesigned to better support external implementations and be easier to debug. This redesign should also have no direct impact for users, except for backward compatibility issues with algorithm plugins for previous versions of Oríon.

🏗 Enhancements

• Improve resiliency of trial reservation @bouthilx (Improve resiliency of trial reservation #693)
• Support batched promotions in ASHA @bouthilx (Support batched promotions in ASHA  #689)
• Refactor algorithms observe/suggest to work on trial objects directly @bouthilx (Refactor algorithms observe/suggest to work on trial objects directly #686)
• Rework factory @bouthilx (Rework factory #681)
• Improve Getting started example command @Delaunay (Improve Getting started exaple command #666)

🐛 Bug Fixes

• Avoid inf-loop in TPE.suggest @bouthilx (Avoid inf-loop in TPE.suggest #680)

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This discussion was created from the release New interface for algorithm's `suggest()` and `observe()` methods..