Test

linux-builder: default `maxJobs` to amount of cores for Linux builder #2039

Job	Run time
install-against-stable	5m 28s
install-flake-against-unstable	6m 42s
install-against-unstable	6m 6s
install-flake-against-stable	3m 59s
test-stable	24m 22s
test-unstable	16m 13s
	1h 2m 50s

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