fs: add chmodSync #2368

Job	Run time
check	31s
build (ubuntu-24.04-arm, linux, aarch64, nightly) / build aarch64-linux	7s
build (macos-latest, darwin, x86_64, nightly) / build x86_64-darwin	5m 54s
build (ubuntu-latest, linux, x86_64, nightly) / build x86_64-linux	6m 48s
build (macos-latest, darwin, aarch64, nightly) / build aarch64-darwin	4m 52s
build (windows-latest, windows, x86_64, nightly-x86_64-pc-windows-gnu) / build x86_64-windows	15m 51s
modules (macos-latest, darwin, aarch64, stable) / aarch64-darwin	4m 47s
modules (macos-latest, darwin, x86_64, stable) / x86_64-darwin	3m 52s
modules (ubuntu-24.04-arm, linux, aarch64, stable) / aarch64-linux	3m 31s
modules (ubuntu-latest, linux, x86_64, stable) / x86_64-linux	3m 28s
modules (windows-latest, windows, x86_64, stable-x86_64-pc-windows-gnu) / x86_64-windows	7m 13s
	56m 54s

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