`tanzu builder cli add-plugin <name>` should prompt for plugin `target` when bootstrapping.

[anujc25]

Describe the feature request Currently, when user/plugindev runs tanzu builder cli add-plugin <plugin-name> command to bootstrap a plugin, a prompt is shown to the user to get the plugin description.

Similarly to that, bootstrapping process should also ask for target of the plugin so that user doesn't need to update the PluginDescriptor manually once the plugin code is generated.

Describe alternative(s) you've considered

Additional context