Fix LineLength for doc block paragraphs

Problem/Motivation

Part of #2572709: [meta] Fix 'Drupal.Files.LineLength' coding standard

Steps to reproduce

Proposed resolution

Wrap paragraphs in doc blocs at 80 characters. This excludes the descriptions for the @param, @return, @throw tags etc.

It is not possible to enforce a change for this with phpcs.xml.dist

Remaining tasks

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet