Expand the qdoc link count report and output as an html page

QTBUG-41850 changed qdoc to output a report of link counts for each module. This report is output as text. It is useful for correcting the depends variable in the module's qdocconf file. But there is other information that can be useful for the doc team doing QA of the Qt docs. For example, it would be helpful to include a page listing the links to the links themselves to make it easier for the doc team to find links that go to the wrong places.

To make this useful, the link count report should be expanded to include the information described above, and it should be output as an html page in the module's output directory. This page will be given a standard name including the module name so that it will be easy to find in each module output directory. Other QA info can then be added to this file.