gix-dir: Walk #3854

Job	Run time
test-32bit (armv7-linux-androideabi)	1m 32s
lint	3m 50s
installation (win-msvc)	10m 3s
cargo-deny (advisories)	31s
pure-rust-build	1m 57s
installation (win-gnu)	9m 28s
installation (win32-msvc)	8m 26s
cargo-deny (bans licenses sources)	29s
test	20m 59s
test-fast (windows-latest)	21m 11s
installation (win32-gnu)	10m 8s
test-fast (macos-latest)	8m 23s
WebAssembly (wasm32-unknown-unknown)	1m 14s
test-fast (ubuntu-latest)	5m 0s
WebAssembly (wasm32-wasi)	1m 9s
	1h 44m 20s

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