Increase close timeout of `Nanny` in `LocalCUDACluster` #329

Job	Run time
checks / other-checks	59s
checks / check-style	2m 23s
wheel-build	58s
conda-python-build / compute-matrix	8s
conda-python-build / build (11.8.0, ubuntu22.04, amd64, 3.9)	4m 23s
conda-python-build / build (11.8.0, ubuntu22.04, arm64, 3.9)	3m 17s
conda-python-build / build (11.8.0, ubuntu22.04, amd64, 3.10)	4m 14s
conda-python-build / build (11.8.0, ubuntu22.04, arm64, 3.10)	3m 25s
conda-python-build / build (12.0.1, ubuntu22.04, amd64, 3.9)	4m 28s
conda-python-build / build (12.0.1, ubuntu22.04, arm64, 3.9)	3m 18s
conda-python-build / build (12.0.1, ubuntu22.04, amd64, 3.10)	4m 20s
conda-python-build / build (12.0.1, ubuntu22.04, arm64, 3.10)	3m 25s
conda-python-tests / compute-matrix	10s
docs-build / build	3m 51s
conda-python-tests / tests (11.2.2, centos7, amd64, 3.9, v100, earliest)	25m 47s
conda-python-tests / tests (11.4.3, ubuntu20.04, amd64, 3.9, v100, latest)	29m 16s
conda-python-tests / tests (11.8.0, ubuntu22.04, amd64, 3.10, v100, latest)	30m 17s
conda-python-tests / tests (12.0.1, ubuntu22.04, amd64, 3.10, v100, latest)	31m 33s
conda-python-tests / tests (12.0.1, ubuntu22.04, arm64, 3.10, a100, latest)	22m 33s
pr-builder / run	4s
	2h 58m 49s

Provide feedback