Avoid creating CUDA context in LocalCUDACluster parent process (#765)

This is helpful for preventing an extra, unnecessary, CUDA context. However, this is only helpful if `Client` is not created in the same process as `LocalCUDACluster`, as otherwise it will anyway create a CUDA context.

Authors:
  - Peter Andreas Entschev (https://github.com/pentschev)

Approvers:
  - Mads R. B. Kristensen (https://github.com/madsbk)

URL: #765

dask_cuda/local_cuda_cluster.py

@@ -327,6 +327,7 @@ def __init__(
         self.host = kwargs.get("host", None)
 
         initialize(
+            create_cuda_context=False,
             enable_tcp_over_ucx=enable_tcp_over_ucx,
             enable_nvlink=enable_nvlink,
             enable_infiniband=enable_infiniband,