16983 api extend wp patch for description

[``* `#16983` Extend API V3's work package PATCH endpoint for description``](https://community.openproject.org/work_packages/16983)
Regardless of what or discussion regarding this leads us to:
This is an external dependency and as such, should only be referenced once in this helper. so e.g.

<pre>
  def link_to(....)
    ActionController::Base.helpers.link_to(...)
  end
</pre>

This could be added dynamically on included because if the module is included in a view, the normal link_to mechanism could take place, and only if it does not exists, could this work around be used.