Return the `Job` from `WorkflowLayout.take` so it can be canceled. #4274

Job	Run time
Build all	5m 24s
ArtifactsCheck	2m 38s
Api check	2m 15s
Dependency Guard	1m 57s
KtLint	2m 29s
Shard Matrix Yaml	2m 6s
Build Tutorials	2m 45s
Instrumentation tests (31, 1)	10m 3s
iOS Tests	2m 28s
Instrumentation tests (31, 2)	7m 33s
JS Tests	3m 13s
Instrumentation tests (31, 3)	14m 17s
Conflate Stale Renderings Runtime JVM Tests	3m 50s
Render On State Change Only and Conflate Stale Runtime JVM Tests	2m 50s
Render On State Change Only Runtime JVM Tests	2m 20s
Performance tests (31)	9m 46s
Alternate Runtime Instrumentation tests (31, 1, conflate)	9m 17s
Alternate Runtime Instrumentation tests (31, 1, baseline-stateChange)	15m 8s
Alternate Runtime Instrumentation tests (31, 1, conflate-stateChange)	11m 19s
Alternate Runtime Instrumentation tests (31, 2, conflate)	13m 28s
Alternate Runtime Instrumentation tests (31, 2, baseline-stateChange)	13m 57s
Alternate Runtime Instrumentation tests (31, 2, conflate-stateChange)	16m 39s
Alternate Runtime Instrumentation tests (31, 3, conflate)	12m 43s
Alternate Runtime Instrumentation tests (31, 3, baseline-stateChange)	11m 53s
Alternate Runtime Instrumentation tests (31, 3, conflate-stateChange)	21m 28s
Android Lint	3m 32s
Dokka	4m 11s
Check	5m 11s
all-green	1s
	3h 34m 41s

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