Need option to ignore OS version check

[proivk]

I want to have option to ignore OS version validation and continue installation. Something like
./kubemarine install --ignoreosversion

However notice message should clearly state that we do not recommend to use OS version other than recommended by us and this gonna be unsupported configuration.

2022-02-03 15:12:06,313 k8s.example.com DEBUG
2022-02-03 15:12:06,314 k8s.example.com CRITICAL FAILURE!
2022-02-03 15:12:06,314 k8s.example.com CRITICAL TASK FAILED prepare.check.system
2022-02-03 15:12:06,314 k8s.example.com CRITICAL KME0001: Unexpected exception
Traceback (most recent call last):
  File "/home/igko0913/git/kubemarine/kubemarine/core/flow.py", line 206, in run_flow
    task(cluster)
  File "/home/igko0913/git/kubemarine/kubemarine/procedures/install.py", line 49, in system_prepare_check_system
    raise Exception("%s running on unknown %s version. "
Exception: 10.0.2.15 running on unknown ubuntu version. Expected ['20.04'], got '21.10'