Adds generic object children template

[abhi1693]

Fixes: #12110

[jeremystretch]

This is great, thanks! I think with a little further cleanup we should be able to simplify it even further and avoid any potentially breaking changes in plugins.

[abhi1693]

There is an issue with the cluster object views which requires more changes or we may have to revert the changes partially or fully for cluster views

[DanSheps]

I really dislike the tab_view.html template name. It does not properly convey what this view does (displays objectchildren lists)

Instead, I would propose we rename it to objectchildren_list.html to properly convey what this template actually does.

[abhi1693]

@DanSheps If you check the latest changes, the file was moved and renamed to generic/object_tab.html

[DanSheps]

@DanSheps If you check the latest changes, the file was moved and renamed to generic/object_tab.html

Still doesn't address the fact that object_tab is overly generic, especially when this template can only be used to generate a list. As mentioned, I think objectchildren_list.html would be better and it also follows already "established convention" as object_list.html is the Object list view (class ObjectListView).

The convention, which is mostly universal within the generics:

• Take the class name and remove "View"
• Take the result, and reverse find the next capital ("List, Edit, Delete") and split forward of that with an underscore
• Lowercase it all
• Add .html

Doing all that gives you the template name (object.html, object_edit.html, object_delete.html, object_list.html)