Add --noblock_for_lock exit code to documentation
Add --noblock_for_lock exit code to documentation

The source for this is https://github.com/bazelbuild/bazel/blob/ac48e65f702d3e135bb0b6729392f9cb485da100/src/main/cpp/util/exit_code.h#L35-L37

Closes #14871.

PiperOrigin-RevId: 431517053

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