Add shellcheck to pre-commit and fix warnings #617

Job	Run time
checks / check-style	2m 13s
checks / other-checks	37s
wheel-build / compute-matrix	2s
wheel-build / 12.5.1, 3.12, amd64, rockylinux8	3m 27s
conda-python-build / compute-matrix	2s
conda-python-build / 11.8.0, 3.10, amd64, rockylinux8	3m 32s
conda-python-build / 12.5.1, 3.10, amd64, rockylinux8	3m 16s
conda-python-build / 11.8.0, 3.11, amd64, rockylinux8	3m 18s
conda-python-build / 12.5.1, 3.11, amd64, rockylinux8	3m 20s
conda-python-build / 11.8.0, 3.12, amd64, rockylinux8	3m 8s
conda-python-build / 12.5.1, 3.12, amd64, rockylinux8	3m 12s
conda-python-build / 11.8.0, 3.10, arm64, rockylinux8	2m 56s
conda-python-build / 12.5.1, 3.10, arm64, rockylinux8	3m 2s
conda-python-build / 11.8.0, 3.11, arm64, rockylinux8	2m 50s
conda-python-build / 12.5.1, 3.11, arm64, rockylinux8	2m 50s
conda-python-build / 11.8.0, 3.12, arm64, rockylinux8	3m 48s
conda-python-build / 12.5.1, 3.12, arm64, rockylinux8	2m 48s
wheel-tests / compute-matrix	2s
wheel-tests / 12.5.1, 3.10, amd64, ubuntu24.04, v100, latest-driver, oldest-deps	34m 13s
wheel-tests / 11.8.0, 3.12, arm64, ubuntu20.04, a100, latest-driver, latest-deps	28m 49s
docs-build / build	3m 43s
conda-python-tests / compute-matrix	2s
conda-python-tests / 11.8.0, 3.10, amd64, rockylinux8, v100, earliest-driver, oldest-deps	43m 38s
conda-python-tests / 12.5.1, 3.12, amd64, ubuntu24.04, v100, latest-driver, latest-deps	55m 52s
conda-python-tests / 12.0.1, 3.11, arm64, ubuntu20.04, a100, latest-driver, latest-deps	37m 14s
pr-builder / run	1s
	4h 7m 55s

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