Improve error message and fail behavior of ParallelBuildChainTest #657 #759

Job	Run time
check-freeze-period / verify-freeze-period	3s
build / Verify Linux	14m 2s
build / Verify Windows	22m 11s
build / Verify MacOS	18m 1s
check-merge-commits / Block Merge Commits	9s
build / Upload Event File	3s
	54m 29s

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