PTFE-1981 handle cancelled build on same sha (#207) #824

Job	Run time
lint	34s
integration (tests-noqueue, QuickTest)	1m 43s
unit (utests)	56s
integration (tests-noqueue, BuildFailedTest)	34s
unit (tests-api-mock)	1m 8s
integration (tests-noqueue, RepositoryTests)	32s
unit (tests-server)	50s
integration (tests-noqueue, TestBertE)	5m 38s
integration (tests-noqueue, TestQueueing)	39s
integration (tests-noqueue, TaskQueueTests)	3m 41s
integration (tests, QuickTest)	1m 40s
integration (tests, BuildFailedTest)	33s
integration (tests, RepositoryTests)	35s
integration (tests, TestBertE)	7m 53s
integration (tests, TestQueueing)	5m 30s
integration (tests, TaskQueueTests)	3m 41s
	36m 7s

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