Fix remaining @Deprecated layout manually and enable the coding standard

Problem/Motivation

This is a follow-on from #3048498: [≈Nov. 11] Fix Drupal.Commenting.Deprecated coding standard where the automated patch fixed 653 of the 675 @deprecated messages reported under the Drupal.Commenting.Deprecated.IncorrectTextLayout sniff.

Remaining tasks

1. Commit the first huge automated conversion chunk
2. Follow-up with patches to fix the rest (manually)
3. Enable the new Drupal.Commenting.Deprecated in phpcs.xml