Allow Seeding the ConfigSpace and Optimization Algorithm (Improvement)

[LabChameleon]

Hi!

for reproducibility, it would be good to allow seeding of the config space used for the DEHB or PBT sweeper. I believe this was originally supposed to be supported since the function

how-to-autorl/hydra_plugins/utils/search_space_encoding.py

Line 35 in da9ecf8

search_space: Union[str, DictConfig, ConfigurationSpace], seed: Optional[int] = None

allows seeding. However, in e.g.

how-to-autorl/hydra_plugins/hydra_dehb_sweeper/dehb_sweeper_backend.py

Line 141 in da9ecf8

configspace = search_space_to_config_space(search_space=self.search_space)

a seed is never passed.

Additionally, I added seeding the numpy random generator. For DEHB this is necessary to seed the differential evolution backend.

See PR #21