Enable keyword arguments for liger functional

[hongpeng-guo]

Summary

This PR enables the keyword arguments of liger functional #368.

1. Warp the Liger Operator Functions (torch.autograd.Function) with an extra layer that can take key word arguments.
2. For each of the liger functions, updating its unit test function test_{operator_name}.py::test_correctness_functional to reflect that keyword args can be accepted.

Testing Done

• Hardware Type: A10G
• run make test to ensure correctness
• run make checkstyle to ensure code style
• run make test-convergence to ensure convergence

[hongpeng-guo]

cc @ByronHsu coming from #399, Made a new PR in the main repo the enable modal unit tests.

[ByronHsu]

@hongpeng-guo let's bump the timeout to 15 mins for modal test

[ByronHsu]

Liger-Kernel/dev/modal/tests.py

Line 17 in 81d98ea

@app.function(gpu="A10G", mounts=[repo], timeout=60 * 10)