Add --command option for the tmt run reboot command

[skycastlelily]

Pull Request Checklist

• implement the feature
• write the documentation
• extend the test coverage
• update the specification
• adjust plugin docstring
• modify the json schema
• mention the version
• include a release note

[skycastlelily]

The test failure is due to this hmmm line,
this mr set a default value to command as a result the plugins will call super().reboot(), and hard is True ,so error is raised.
This mr would fix the issue^^

[happz]

The test failure is due to this hmmm line, this mr set a default value to command as a result the plugins will call super().reboot(), and hard is True ,so error is raised. This mr would fix the issue^^

You can change the base branch of this PR to cleanup-guest-reboot-implementations and rebase, that should give you the combination of both patches.

[skycastlelily]

The test failure is due to this hmmm line, this mr set a default value to command as a result the plugins will call super().reboot(), and hard is True ,so error is raised. This mr would fix the issue^^

You can change the base branch of this PR to cleanup-guest-reboot-implementations and rebase, that should give you the combination of both patches.

Done^^