Allow user provided platform constraints #944

Job	Run time
abs_paths_test (true)	2m 7s
lint	20s
abs_paths_test (false)	2m 15s
container_test (archlinux, true)	2m 33s
external_test (macos-13, latest, true)	11m 37s
container_test (archlinux, false)	2m 27s
external_test (macos-13, latest, false)	13m 3s
sys_paths_test (true)	3m 30s
container_test (debian, true)	2m 45s
external_test (ubuntu-latest, latest, true)	7m 43s
test (macos-latest, 7.0.0, true)	3m 7s
container_test (debian, false)	2m 46s
sys_paths_test (false)	3m 24s
external_test (ubuntu-latest, latest, false)	7m 44s
test (macos-latest, 7.0.0, false)	3m 3s
container_test (fedora, true)	2m 52s
test (macos-latest, latest, true)	2m 57s
container_test (fedora, false)	3m 10s
container_test (suse_leap, true)	3m 1s
xcompile_test (true)	2m 23s
container_test (suse_leap, false)	2m 52s
xcompile_test (false)	2m 0s
test (macos-latest, latest, false)	2m 40s
container_test (suse_tumbleweed, true)	2m 47s
test (ubuntu-latest, 7.0.0, true)	2m 16s
container_test (suse_tumbleweed, false)	2m 51s
test (ubuntu-latest, 7.0.0, false)	2m 22s
container_test (ubuntu_20_04, true)	2m 42s
test (ubuntu-latest, latest, true)	2m 24s
container_test (ubuntu_20_04, false)	2m 41s
test (ubuntu-latest, latest, false)	2m 25s
container_test (ubuntu_22_04, true)	2m 41s
container_test (ubuntu_22_04, false)	2m 34s
container_test (linux_sysroot, true)	2m 44s
container_test (linux_sysroot, false)	2m 31s
	2h 1m 17s

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