Fix Fused MoE LoRA Triton kernel bug

[chaojun-zhang]

Purpose

• Fix Error "Overflow when unpacking long" in get_ptr (e.g. XPU platform)
• Fix the issue of calling _fused_moe_lora_kernel with an undefined "launch_pdl" parameter.

Test Plan

pytest -s -v tests/lora/test_fused_moe_lora_kernel.py

Test Result

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• The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
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[gemini-code-assist]

Code Review

This PR correctly fixes two bugs in the Fused MoE LoRA Triton kernel: one preventing a pointer overflow by specifying dtype=torch.uint64, and another fixing a TypeError by removing launch_pdl from the kernel's compile-time configuration. My review includes suggestions to move the launch_pdl parameter to the kernel launch call to ensure the intended performance optimizations from Programmatic Dependent Launch are not lost.

[gemini-code-assist]

Similar to the _fused_moe_lora_shrink function, removing launch_pdl from this configuration dictionary is the correct way to fix the TypeError. To complete the fix and ensure the Programmatic Dependent Launch (PDL) optimization is still active, please add launch_pdl=use_gdc to the _fused_moe_lora_kernel launch call at line 345.