W&B: allow more control over run name

Problem

Currently, when using W&B logging, AIXD adds a new slug name at each run, even if 'name_run' is given

Request

• keep the given 'run_name',
• check if the name already exists else append a suffix, or
• add a new argument e.g. 'run_series' to tag models of the same type/setup but different runs