path.c: translate Windows paths recorded by Windows git on POSIX hosts #27640

Job	Run time
config	10s
fuzz smoke test	2m 46s
win build	5m 14s
static-analysis	6m 35s
sparse	3m 50s
documentation	7m 54s
osx-clang (macos-14)	21m 12s
osx-reftable (macos-14)	18m 1s
osx-meson (macos-14)	22m 16s
osx-gcc (macos-14)	22m 47s
rust-analysis	1m 24s
linux-sha256 (ubuntu:rolling)	1m 24s
win+Meson build	5m 17s
fedora-breaking-changes-meson (fedora:latest)	9m 29s
linux-leaks (ubuntu:rolling)	28m 28s
linux-TEST-vars (ubuntu:20.04)	12m 26s
linux-reftable-leaks (ubuntu:rolling)	29m 11s
linux32 (i386/ubuntu:focal)	10m 0s
linux-breaking-changes (ubuntu:rolling)	10m 55s
linux-reftable (ubuntu:rolling)	1m 20s
linux-meson (ubuntu:rolling)	11m 44s
linux-asan-ubsan (ubuntu:rolling)	2m 16s
almalinux-8 (almalinux:8)	8m 16s
debian-11 (debian:11)	49m 1s
win+VS build	0s
linux-musl-meson (alpine:latest)	8m 5s
win+VS test	-1s
win test (6)	7m 8s
win test (8)	6m 21s
win test (1)	7m 35s
win test (7)	6m 53s
win test (9)	11m 47s
win test (3)	8m 26s
win test (0)	7m 9s
win test (2)	8m 52s
win test (4)	8m 21s
win test (5)	8m 59s
win+Meson test (5)	9m 14s
win+Meson test (0)	9m 37s
win+Meson test (4)	6m 35s
win+Meson test (8)	8m 4s
win+Meson test (9)	7m 25s
win+Meson test (7)	5m 39s
win+Meson test (1)	10m 45s
win+Meson test (6)	11m 6s
win+Meson test (3)	6m 6s
win+Meson test (2)	10m 17s
	7h 46m 19s

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