CI: Consolidate the test matrix in a json file

[leofang]

We currently hard-code the test matrix in the workflows, for example

cuda-python/.github/workflows/test-wheel-linux.yml

Lines 46 to 103 in ce80737

	# Set a default GPU based upon architecture.
	gpu="l4"
	if [[ "${ARCH}" == "arm64" ]]; then
	gpu="a100"
	fi
	# Add a special entry for the H100 runner on amd64.
	special_runner=""
	if [[ "${ARCH}" == "amd64" ]]; then
	special_runner="- { ARCH: ${ARCH}, PY_VER: '3.13', CUDA_VER: '13.0.0', LOCAL_CTK: '1', GPU: 'H100', DRIVER: 'latest' }"
	fi
	# Please keep the matrices sorted in ascending order by the following:
	#
	# [PY_VER, CUDA_VER, LOCAL_CTK, GPU, DRIVER]
	#
	# Note that DRIVER: `earliest` does not work with CUDA 12.9.0 and LOCAL_CTK: 0 does not work with CUDA 12.0.1.
	#
	export MATRICES="
	pull-request:
	- { ARCH: ${ARCH}, PY_VER: '3.9', CUDA_VER: '12.9.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.9', CUDA_VER: '13.0.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.10', CUDA_VER: '12.9.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.10', CUDA_VER: '13.0.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.11', CUDA_VER: '12.9.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.11', CUDA_VER: '13.0.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.12', CUDA_VER: '12.9.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.12', CUDA_VER: '13.0.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.13', CUDA_VER: '12.9.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.13', CUDA_VER: '13.0.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	${special_runner}
	nightly:
	- { ARCH: ${ARCH}, PY_VER: '3.9', CUDA_VER: '11.8.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'earliest' }
	- { ARCH: ${ARCH}, PY_VER: '3.9', CUDA_VER: '11.8.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.9', CUDA_VER: '12.0.1', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.9', CUDA_VER: '12.9.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.9', CUDA_VER: '12.9.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.10', CUDA_VER: '11.8.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'earliest' }
	- { ARCH: ${ARCH}, PY_VER: '3.10', CUDA_VER: '11.8.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.10', CUDA_VER: '12.0.1', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.10', CUDA_VER: '12.9.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.10', CUDA_VER: '12.9.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.11', CUDA_VER: '11.8.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'earliest' }
	- { ARCH: ${ARCH}, PY_VER: '3.11', CUDA_VER: '11.8.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.11', CUDA_VER: '12.0.1', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.11', CUDA_VER: '12.9.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.11', CUDA_VER: '12.9.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.12', CUDA_VER: '11.8.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'earliest' }
	- { ARCH: ${ARCH}, PY_VER: '3.12', CUDA_VER: '11.8.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.12', CUDA_VER: '12.0.1', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.12', CUDA_VER: '12.9.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.12', CUDA_VER: '12.9.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.13', CUDA_VER: '11.8.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'earliest' }
	- { ARCH: ${ARCH}, PY_VER: '3.13', CUDA_VER: '11.8.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.13', CUDA_VER: '12.0.1', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.13', CUDA_VER: '12.9.0', LOCAL_CTK: '0', GPU: ${gpu}, DRIVER: 'latest' }
	- { ARCH: ${ARCH}, PY_VER: '3.13', CUDA_VER: '12.9.0', LOCAL_CTK: '1', GPU: ${gpu}, DRIVER: 'latest' }
	${special_runner}
	"

which is a bit hard to locate and breaks the principle to separate data from execution logistics. If we are hardcoding anyway, I'd prefer us to keep them in a json file under the ci folder.