Add support to /dev/disk/by-path device reference #2860

Job	Run time
detect	1s
build-toolkit	1m 47s
build-matrix (green) / build-os	3m 33s
build-matrix (green) / detect	9s
build-matrix (green) / build-disk	2m 55s
build-matrix (green) / build-iso	1m 26s
build-matrix (green) / test-installer	15m 37s
build-matrix (green) / tests-matrix (test-upgrade)	15m 3s
build-matrix (green) / tests-matrix (test-downgrade)	41m 28s
build-matrix (green) / tests-matrix (test-recovery)	40m 25s
build-matrix (green) / tests-matrix (test-fallback)	20m 11s
build-matrix (green) / tests-matrix (test-fsck)	13m 22s
build-matrix (green) / tests-matrix (test-grubfallback)	12m 23s
	2h 48m 20s

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