Task assigned to only one group when multiple groups are run

[baberabb]

Not sure if this is an issue or if this is the expected way, but if we have a task assigned to two groups in the config and run both groups, for e.g with gsm8k:

group:
  - math_word_problems
  - new_group

and --tasks math_word_problems,new_group

the task_dict is:

... ('gsm8k', ('math_word_problems', <lm_eval.api.task.ConfigurableTask object at 0x1760df5c0>)), ...

Haven't tested if it's different in benchmarks.