Fixups to scheduler/priority settings #7225

Job	Run time
cross-i386	1m 3s
test (ubuntu-20.04, 1.22.x, rootless, -race)	7m 8s
test (ubuntu-20.04, 1.22.x, rootless)	7m 11s
test (ubuntu-20.04, 1.22.x, -race)	7m 43s
test (ubuntu-20.04, 1.22.x)	7m 10s
test (ubuntu-20.04, 1.23.x, rootless, -race)	7m 3s
test (ubuntu-20.04, 1.23.x, rootless)	6m 44s
test (ubuntu-20.04, 1.23.x, -race)	7m 43s
test (ubuntu-20.04, 1.23.x)	6m 54s
test (ubuntu-20.04, 1.23.x, criu-dev)	7m 39s
test (ubuntu-24.04, 1.22.x, rootless, -race)	9m 38s
test (ubuntu-24.04, 1.22.x, rootless)	9m 11s
test (ubuntu-24.04, 1.22.x, -race)	8m 0s
test (ubuntu-24.04, 1.22.x)	6m 59s
test (ubuntu-24.04, 1.23.x, rootless, -race)	9m 39s
test (ubuntu-24.04, 1.23.x, rootless)	10m 33s
test (ubuntu-24.04, 1.23.x, -race)	8m 0s
test (ubuntu-24.04, 1.23.x)	7m 9s
test (ubuntu-24.04, 1.23.x, criu-dev)	7m 44s
test (actuated-arm64-6cpu-8gb, 1.23.x, rootless)	11m 33s
test (actuated-arm64-6cpu-8gb, 1.23.x)	7m 51s
all-done	1s
	2h 42m 36s

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