[Bug][Testing] Broken test_loss_functions.py

[jaketae]

Bug Explanation

A number of open PRs are being affected by test_loss_functions.py, which is failing on the CI with the following error message ((example job)[https://github.com/unifyai/ivy/actions/runs/3853660784/jobs/6566851736]):

_ ERROR collecting ivy_tests/test_ivy/test_frontends/test_torch/test_loss_functions.py _
(https://github.com/unifyai/ivy/actions/runs/3853660784/jobs/6566851736#step:6:62)
ivy_tests/test_ivy/test_frontends/test_torch/test_loss_functions.py:203: in <module>
(https://github.com/unifyai/ivy/actions/runs/3853660784/jobs/6566851736#step:6:63)
    dtype_and_pos_weight=helpers.array_or_none(
(https://github.com/unifyai/ivy/actions/runs/3853660784/jobs/6566851736#step:6:64)
E   AttributeError: module 'ivy_tests.test_ivy.helpers' has no attribute 'array_or_none'
(https://github.com/unifyai/ivy/actions/runs/3853660784/jobs/6566851736#step:6:65)
_ ERROR collecting ivy_tests/test_ivy/test_frontends/test_torch/test_tensor.py _

The problematic helpers.array_or_none() function was deleted in commit c8d0524.

Steps to Reproduce Bug

CI logs

Environment

N/A

Ivy Version

master

Backend

• NumPy
• TensorFlow
• PyTorch
• JAX

Device

No response

[jaketae]

As can be seen in the referenced commit, this can be fixed by replacing helper.array_or_none() with st.one_of(...). Will publish a PR with this fix.