Deprecate/rewrite Data Quality Report

[manycoding]

Current DQR https://arche.readthedocs.io/en/latest/nbs/DQR.html is:

• scores based on schema validation and some rules\stats https://github.com/scrapinghub/arche/blob/master/src/arche/quality_estimation_algorithm.py
• table of job stats
• some rules summary
• coverage graph (same as in the main report)
• categories tables

I don't think it provides accurate information for developers. My idea is to remove it completely, focusing on the main report #119 #164

[manycoding]

Search find . -type f -mtime -90 -name *.ipynb -print -exec grep -l 'data_quality_report' {} \; shows that data_quality_report hasn't been used for 3 months.