add causal-conv1d in Triton and integrate into vLLM with test code #18206
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This PRs add causal-conv1d in Triton, making Mamba-based models as Triton-only backend.
There are two kernels implemented
Also, some other improvement in reducing overhead is incorporated.
Test code is also added
Currently, the code is added as an optional pathway to the CUDA-split via
VLLM_USE_TRITON_CONV1D
environment variable set to 1.