path: fix normalization of Windows device paths missing colon #2706

Job	Run time
Build slim tarball	1m 39s
x86_64-linux: with shared libraries	2h 6m 5s
aarch64-linux: with shared libraries	1h 30m 33s
x86_64-darwin: with shared libraries	1h 49m 6s
aarch64-darwin: with shared libraries	2h 14m 39s
	7h 42m 2s

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