perf: support demo pre-runs #1096

Job	Run time
test-itkwasm (ubuntu-22.04, 3, 7)	1m 10s
test-itkwasm (ubuntu-22.04, 3, 8)	1m 26s
test-itkwasm (ubuntu-22.04, 3, 9)	1m 55s
test-itkwasm (ubuntu-22.04, 3, 10)	2m 19s
test-itkwasm (ubuntu-22.04, 3, 11)	2m 25s
test-itkwasm (windows-2022, 3, 7)	2m 51s
test-itkwasm (windows-2022, 3, 8)	2m 13s
test-itkwasm (windows-2022, 3, 9)	2m 7s
test-itkwasm (windows-2022, 3, 10)	7m 19s
test-itkwasm (windows-2022, 3, 11)	6m 35s
test-itkwasm (macos-12, 3, 7)	1m 53s
test-itkwasm (macos-12, 3, 8)	1m 51s
test-itkwasm (macos-12, 3, 9)	1m 54s
test-itkwasm (macos-12, 3, 10)	2m 55s
test-itkwasm (macos-12, 3, 11)	2m 56s
test-pythonpackages (ubuntu-22.04, 3, 7)	1m 42s
test-pythonpackages (ubuntu-22.04, 3, 8)	1m 38s
test-pythonpackages (ubuntu-22.04, 3, 9)	1m 38s
test-pythonpackages (ubuntu-22.04, 3, 10)	6m 43s
test-pythonpackages (ubuntu-22.04, 3, 11)	5m 28s
test-pythonpackages (windows-2022, 3, 7)	3m 4s
test-pythonpackages (windows-2022, 3, 8)	5m 5s
test-pythonpackages (windows-2022, 3, 9)	5m 38s
test-pythonpackages (windows-2022, 3, 10)	16m 21s
test-pythonpackages (windows-2022, 3, 11)	18m 13s
test-pythonpackages (macos-12, 3, 7)	4m 1s
test-pythonpackages (macos-12, 3, 8)	3m 8s
test-pythonpackages (macos-12, 3, 9)	3m 12s
test-pythonpackages (macos-12, 3, 10)	8m 39s
test-pythonpackages (macos-12, 3, 11)	7m 27s
	2h 13m 46s

Provide feedback