### Summary

Add RedOS support for hostname module plugin

### Issue Type

Feature Idea

### Component Name

hostname

### Additional Information

Just add class of redos for hostname
```
class RedosHostname(Hostname):
    platform = 'Linux'
    distribution = 'RED'
    strategy_class = SystemdStrategy
```


### Code of Conduct

- [X] I agree to follow the Ansible Code of Conduct
def __init__(self, module):
        self.module = module
    def update_current_and_permanent_hostname(self):
        self.unimplemented_error()
    def update_current_hostname(self):
        self.unimplemented_error()
    def update_permanent_hostname(self):
        self.unimplemented_error()
    def get_current_hostname(self):
        self.unimplemented_error()
    def set_current_hostname(self, name):
        self.unimplemented_error()
    def get_permanent_hostname(self):
        self.unimplemented_error()
    def set_permanent_hostname(self, name):
        self.unimplemented_error()
    def unimplemented_error(self):
        system = platform.system()
        distribution = get_distribution()
        if distribution is not None:
            msg_platform = '%s (%s)' % (system, distribution)
        else:
            msg_platform = system
        self.module.fail_json(
            msg='hostname module cannot be used on platform %s' % msg_platform)
class Hostname(object):