Poor man's cobalt target (#4277) #16096

Job	Run time
linux-cobalt / initialize	1m 17s
linux-x64 / initialize	1m 25s
linux-cobalt / docker-build-image	3m 28s
linux-x64 / docker-build-image	3m 31s
linux-cobalt / x64_devel	26m 8s
linux-cobalt / x64_debug	25m 5s
linux-cobalt / x64_qa	24m 52s
linux-cobalt / x64_gold	27m 56s
linux-x64 / x64_devel	24m 1s
linux-x64 / x64_debug	24m 56s
linux-x64 / x64_qa	25m 33s
linux-x64 / x64_gold	28m 54s
	3h 37m 6s

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