test-renderers: Fail if the renderer reported UNFINISHED. #91

Job	Run time
miri	2m 2s
build (ubuntu, stable, locked, true)	1h 6m 10s
build (windows, stable, locked, false)	28m 17s
build (macos, stable, locked, false)	18m 52s
build (ubuntu, nightly, locked, false)	35m 18s
build (ubuntu, beta, locked, false)	16m 51s
build (ubuntu, stable, latest, false)	27m 22s
build (ubuntu, stable, minimal, false)	23m 12s
deploy	9s
fuzz	17m 10s
	3h 55m 23s

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