Remove redundant --module flag for manage/unmanage commands

[kwiatekus]

Description

Commands to manage/unmanage module offers different way to specify target module than commands to add/delete module

kyma@v3 alpha module add keda --default-cr
vs
kyma@v3 alpha module manage --module keda
kyma@v3 alpha module unmanage --module keda

Remove the --module flag for manage/unmanage commands as it is redundant.
Make it:

`kyma@v3 alpha module manage keda`
`kyma@v3 alpha module unmanage keda`

Reasons

Consistency in this matter will be good for user experience

Attachments

[kwiatekus]

Please print out msg that confirms succesful operation:

"Module set to un-/managed"