Update `get_available_gpus` and `set_gpus` #61

Job	Run time
install_with_pip (ubuntu-latest, 3.8)	8s
use_as_local_module (ubuntu-latest, 3.8)	10s
install_with_pip (ubuntu-latest, 3.9)	8s
use_as_local_module (ubuntu-latest, 3.9)	14s
install_with_pip (ubuntu-latest, 3.10)	10s
use_as_local_module (ubuntu-latest, 3.10)	10s
install_with_pip (ubuntu-latest, 3.11)	7s
use_as_local_module (ubuntu-latest, 3.11)	11s
install_with_pip (macos-latest, 3.8)	33s
use_as_local_module (macos-latest, 3.8)	41s
install_with_pip (macos-latest, 3.9)	10s
use_as_local_module (macos-latest, 3.9)	11s
install_with_pip (macos-latest, 3.10)	9s
use_as_local_module (macos-latest, 3.10)	12s
install_with_pip (macos-latest, 3.11)	9s
use_as_local_module (macos-latest, 3.11)	13s
install_with_pip (windows-latest, 3.8)	19s
use_as_local_module (windows-latest, 3.8)	40s
install_with_pip (windows-latest, 3.9)	22s
use_as_local_module (windows-latest, 3.9)	35s
install_with_pip (windows-latest, 3.10)	31s
use_as_local_module (windows-latest, 3.10)	32s
install_with_pip (windows-latest, 3.11)	31s
use_as_local_module (windows-latest, 3.11)	39s
	7m 45s

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