fix(credentials): set owner-only file permissions (#3256) #18887

Job	Run time
Performance: zsh rprompt	1m 16s
Build and Test	1m 50s
Draft Release for PR	0s
build-release	0s
Draft Release	8s
build-release (forge-aarch64-unknown-linux-gnu, target/aarch64-unknown-linux-gnu/release/forge, t...	12m 20s
build-release (forge-x86_64-unknown-linux-musl, target/x86_64-unknown-linux-musl/release/forge, t...	11m 59s
build-release (forge-x86_64-apple-darwin, target/x86_64-apple-darwin/release/forge, false, macos-...	12m 19s
build-release (forge-aarch64-unknown-linux-musl, target/aarch64-unknown-linux-musl/release/forge,...	12m 13s
build-release (forge-x86_64-pc-windows-msvc.exe, target/x86_64-pc-windows-msvc/release/forge.exe,...	22m 52s
build-release (forge-x86_64-unknown-linux-gnu, target/x86_64-unknown-linux-gnu/release/forge, fal...	10m 49s
build-release (forge-aarch64-apple-darwin, target/aarch64-apple-darwin/release/forge, false, maco...	13m 23s
build-release (forge-aarch64-pc-windows-msvc.exe, target/aarch64-pc-windows-msvc/release/forge.ex...	23m 0s
build-release (forge-aarch64-linux-android, target/aarch64-linux-android/release/forge, true, ubu...	12m 35s
	2h 14m 44s

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