🐛 CLI: Set default for `--safe-interval`

[mbercx]

When trying to reconfigure the core.ssh transport of a computer non-interactively using -n, it still asks for the --safe-interval option:

❯ verdi computer configure core.ssh eiger -n --no-use-login-shell
Usage: verdi computer configure core.ssh [OPTIONS] COMPUTER
Try 'verdi computer configure core.ssh --help' for help.

Error: Missing option '--safe-interval'.

This probably means the default is somehow not properly set or reobtained from the previous configuration.

[mbercx]

Also see https://github.com/aiidateam/aiida-core/pull/5845