disable missing and unseen #860

Job	Run time
bld (linux_release_64, ubuntu-20.04, -release_64, -asm)	4m 3s
bld (linux_debug_64, ubuntu-20.04, -debug_64)	3m 25s
bld (mac_release_64, macos-13, -release_64, -asm)	3m 8s
bld (mac_debug_64, macos-13, -debug_64)	1m 26s
bld (mac_release_arm, macos-14, -release_arm, -asm)	43s
bld (mac_debug_arm, macos-14, -debug_arm)	26s
bld (win_release_64, windows-2022, -release_64)	2m 23s
bld (win_debug_64, windows-2022, -debug_64)	1m 46s
testC (linux_release_64, ubuntu-latest, -release_64, -existing_release_64, -valgrind)	5m 55s
testC (linux_debug_64, ubuntu-latest, -debug_64, -existing_debug_64, -valgrind)	6m 9s
testC (linux_release_32, ubuntu-latest, -release_32, -valgrind)	1m 49s
testC (linux_debug_32, ubuntu-latest, -debug_32, -valgrind)	1m 41s
	32m 54s

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