Remove redundant template from data_processing/data_plugins

Remove 'project/data_processing.data_plugins/_versions_list.html' template
and make a list of versions at the plugins table using standard Column
class attributes.

Closes-Bug: #1356821

Change-Id: I8121bb658f9799f6cfa7738cdbb5cfa9bbf39cfe
Merge "Remove redundant template from data_processing/data_plugins"