[BUG] `test` split forced to hit `Careful` warning

[jamesbraza]

Describe the bug

Using hf_avail_splits=["test"] with LightevalTaskConfig you are forced to hit:

[2025-06-06 18:21:10,501] [ WARNING]: Careful, the task community|foo is using evaluation data to build the few shot examples. (lighteval_task.py:260)

To Reproduce

Since "test" isn't a value in allowed_splits at https://github.com/huggingface/lighteval/blob/v0.10.0/src/lighteval/tasks/lighteval_task.py#L251.

Expected behavior

Not forced to hit a warning with hf_avail_splits=["test"], since test is a commonly used split.

Version info

lighteval==0.10.0