Move sampler into CUDA graph

[hnyls2002]

Motivation

Modifications

Checklist

• Format your code according to the Contributor Guide.
• Add unit tests as outlined in the Contributor Guide.
• Update documentation as needed, including docstrings or example tutorials.

[hnyls2002]

For some unknown torch compile bugs, it is fixed in a strange method

sglang/python/sglang/srt/layers/sampler.py

Lines 58 to 60 in 7378d09

	if is_torch_compile:
	# FIXME: Temporary workaround for unknown bugs in torch.compile
	logits.add_(0)

Similar issues:

pytorch/pytorch#129685

https://github.com/pytorch/pytorch/pull/124119/files#diff-809c39aeafb3acc92289f42a63e670a8719d4ce5627d5f88820142d80edf8d2a