NVCC required when invoking flashinfer-cli

[bbartels]

Now that pre-compiled wheels are published, nvcc shouldn't be a hard requirement anymore. But on an installation without nvcc flashinfer show-config fails with Could not find nvcc.
This originates here:

flashinfer/flashinfer/__main__.py

Line 82 in c3ff7e7

"CUDA_HOME": get_cuda_path(),

With the exception being thrown here:
https://github.com/flashinfer-ai/flashinfer/blob/main/flashinfer/jit/cpp_ext.py#L51

[yzh119]

Fixed in #1905