LPS-52259 Extract asset tags navigation and asset tags cloud to an osgi module

Hi Brian,

It's not possible split the two portlets into different modules, because both portlets are sharing the same jps. There is an only difference between asset tags navigation and asset tags cloud and it is the default configuration, in tags cloud we have a default configuration and in tags navigation we don't have.

Also, in other web modules like polls and bookmarks we have two portlets.

I've added on top of your changes a refactorization, so If you prefer you can delete those commits. I've removed navigation for the module and I've renamed the package to com.liferay.asset.tags.web, to make it more generic and consistent with polls and bookmarks.

Thanks,
Eudaldo.