[Common] Remove CheckTensor if the workspace is empty in cast_transpose_fused

[phu0ngng]

Description

In JAX, we call dbias_cast_transpose and dact_dbias_cast_transpose with empty tensors to get the workspace size before calling the actual functions. So this fix is needed.

Type of change

• [ ] Documentation change (change only to the documentation, either a fix or a new content)
• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Infra/Build change
• [ ] Code refractor

Changes

• [x] I have read and followed the contributing guidelines
• [ ] The functionality is complete
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes

[phu0ngng]

Hi, I added another small change that fixed the issue:

FAILED tests/jax/test_single_gpu_mnist.py::TestMNIST::test_te_bf16 - ValueError: The repository for mnist contains custom code which must be executed to correctly ...

This issue does not relate to the previous issue, but without this fix the CI won't come back clean so I decided to push it to the same PR.

[phu0ngng]

/te-ci jax