Rework for Jenkins testing #1252

Job	Run time
coverage	1m 40s
test-cxx (ubuntu-20.04, g++-9)	1m 27s
test-cxx (ubuntu-22.04, g++-12)	56s
all-builds	1m 51s
test-cxx (ubuntu-20.04, clang++-10)	1m 18s
test-python (ubuntu-20.04, gcc-9, g++-9, 3.9)	1m 10s
lint	1m 17s
test-python (ubuntu-22.04, gcc-12, g++-12, 3.12)	58s
test-cxx (ubuntu-22.04, clang++-14)	50s
test-python (ubuntu-20.04, clang-10, clang++-10, 3.12)	1m 40s
test-cxx (macos-14, clang++)	1m 29s
test-python (ubuntu-22.04, clang-14, clang++-14, 3.12)	1m 36s
test-python (macos-14, clang, clang++, 3.12)	1m 45s
cibuildwheel-linux	1s
cibuildwheel-macos	1s
sdist	1s
combine	1s
	18m 1s

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