cancellation file support for bluebox #1396

Job	Run time
sdist - Ubuntu 3.9 Intel	7s
Check - Ubuntu 3.9 Intel	10s
Wheel - macOS 3.8 ARM	1m 28s
Wheel - macOS 3.8 Intel	2m 44s
Wheel - macOS 3.9 ARM	1m 30s
Wheel - macOS 3.9 Intel	1m 53s
Wheel - macOS 3.10 ARM	1m 35s
Wheel - macOS 3.10 Intel	1m 48s
Wheel - macOS 3.11 ARM	1m 43s
Wheel - macOS 3.11 Intel	1m 39s
Wheel - macOS 3.12 ARM	2m 0s
Wheel - macOS 3.12 Intel	2m 3s
Wheel - Ubuntu 3.8 ARM	2m 51s
Wheel - Ubuntu 3.8 Intel	3m 7s
Wheel - Ubuntu 3.9 ARM	3m 3s
Wheel - Ubuntu 3.9 Intel	3m 7s
Wheel - Ubuntu 3.10 ARM	3m 23s
Wheel - Ubuntu 3.10 Intel	3m 9s
Wheel - Ubuntu 3.11 ARM	3m 8s
Wheel - Ubuntu 3.11 Intel	3m 7s
Wheel - Ubuntu 3.12 ARM	4m 57s
Wheel - Ubuntu 3.12 Intel	3m 12s
Wheel - Windows 3.8 Intel	2m 19s
Wheel - Windows 3.9 Intel	2m 42s
Wheel - Windows 3.10 Intel	1m 33s
Wheel - Windows 3.11 Intel	1m 37s
Wheel - Windows 3.12 Intel	2m 2s
Upload to PyPI - ${{ matrix.os.name }} ${{ matrix.python.major-dot-minor }} ${{ matrix.arch.name }}	0s
	1h 1m 57s

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