When using --disable-plugin or --enable-plugin match both _ and - in the plugin name

[kontura]

Similarly to dnf4: https://bugzilla.redhat.com/show_bug.cgi?id=1980712

We have a libdnf5 plugin called: python_plugins_loader this plugin is in python3-libdnf5-python-plugins-loader package, users might try to disable it with --disable-plugin=python-plugins-loader.

We can rename the plugin to python-plugins-loader (also set it in its config file), this would make it work or we could add some additional logic to accept both python-plugins-loader and python_plugins_loader.