Change the name of the transforms menu item to Wrangler

PR: https://github.com/cdapio/cdap/pull/11262

Instead of this, let's rename the menu item in the navbar from Transforms to Wrangler.

The two discordant names (Wrangler vs Preparation/Transformation) was a point a great confusion for all participants of the user study. 

To be clear: I am not advocating for the name "Transform", I am advocating to change the node name to reflect the name of the tool they just used to clean the data.

I understand your ( and ) hesitation with the name Transform. All I am saying that name it differently from the app is very very confusing to the users and makes it for a poor user experience. Perhaps we should rethink the name "Transform"?

I don't think we should do this. Can we keep it as Wrangler, and come back to it later, considering that its a different context from the visual transformation screen? Transform within the pipeline context has a very specific meaning, and it would be very confusing to call a specific plugin 'Transform'

if we switch the node name to "Transform", won't it become ambiguous? We have a plugin called transform and plugin type called transform