OpenCL: work-around for double precision GPU on Apple-silicon #1727

Job	Run time
Python 3.8 on ubuntu-20.04 PyQt5	9m 45s
Python 3.8 on ubuntu-20.04 PyQt5	9m 45s
Python 3.11 on ubuntu-latest PyQt6	10m 38s
Python 3.11 on ubuntu-latest PyQt6	10m 38s
Python 3.12 on ubuntu-latest PySide6	10m 7s
Python 3.12 on ubuntu-latest PySide6	10m 7s
Python 3.10 on macos-13 PyQt5	14m 27s
Python 3.10 on macos-13 PyQt5	14m 27s
Python 3.12 on macos-13 PyQt6	17m 48s
Python 3.12 on macos-13 PyQt6	17m 48s
Python 3.9 on macos-13 PySide6	15m 6s
Python 3.9 on macos-13 PySide6	15m 6s
Python 3.9 on windows-latest PyQt5	10m 7s
Python 3.9 on windows-latest PyQt5	10m 7s
Python 3.12 on windows-latest PyQt6	11m 17s
Python 3.12 on windows-latest PyQt6	11m 17s
Python 3.10 on windows-latest PySide6	9m 52s
Python 3.10 on windows-latest PySide6	4m 57s
	3h 33m 19s

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