Support for `--no-gpg-sign` in git rebase, cherry-pick, etc

Hello,

The subcommand `git commit` supports a `--no-gpg-sign` argument, which I
find useful for cases where e.g. a GPG key is specified in `.gitconfig`,
but is located on a hardware key that may not currently be attached to
the system. However, other commands like `git rebase`, `git
cherry-pick`, etc, which internally invoke `git commit`, don't support
this argument at all, making things more cumbersome. It'd be great if
these other commands could also support this argument, and propagate it
internally when calling `git commit`.

Thanks,

Dominic