path: canonicalize Windows namespaced paths #7771

Job	Run time
Build slim tarball	1m 36s
x86_64-linux: with shared libraries	25m 50s
aarch64-linux: Cache V8 build	27s
x86_64-darwin: with shared libraries	38m 29s
aarch64-darwin: with shared libraries	28m 42s
aarch64-linux: with shared boringssl-0.20260526.0	24m 11s
aarch64-linux: with shared openssl-3.6.2	23m 39s
aarch64-linux: with shared openssl-1.1.1w	22m 52s
aarch64-linux: with shared openssl-3.5.6	23m 44s
aarch64-linux: with shared openssl-4.0.0	23m 25s
aarch64-linux: with shared openssl-3.0.20	23m 56s
	3h 56m 51s

Provide feedback